diff --git a/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostAttachment.kt b/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostAttachment.kt
index 7034732e..b0315a69 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostAttachment.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostAttachment.kt
@@ -1,6 +1,5 @@
 package jp.juggler.subwaytooter.actpost
 
-
 import android.app.Dialog
 import android.net.Uri
 import android.view.View
diff --git a/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostCharCount.kt b/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostCharCount.kt
index db1b3fce..7cf7068b 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostCharCount.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostCharCount.kt
@@ -1,6 +1,5 @@
 package jp.juggler.subwaytooter.actpost
 
-
 import jp.juggler.subwaytooter.ActPost
 import jp.juggler.subwaytooter.R
 import jp.juggler.subwaytooter.api.ApiTask
diff --git a/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostDrafts.kt b/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostDrafts.kt
index be19ef20..e7bc3312 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostDrafts.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostDrafts.kt
@@ -1,6 +1,5 @@
 package jp.juggler.subwaytooter.actpost
 
-
 import androidx.appcompat.app.AlertDialog
 import jp.juggler.subwaytooter.ActPost
 import jp.juggler.subwaytooter.App1
diff --git a/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostExtra.kt b/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostExtra.kt
index 2608e070..4157812f 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostExtra.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostExtra.kt
@@ -1,6 +1,5 @@
 package jp.juggler.subwaytooter.actpost
 
-
 import android.content.Intent
 import android.net.Uri
 import android.view.View
diff --git a/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostMushroom.kt b/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostMushroom.kt
index ddd51d36..49174786 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostMushroom.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostMushroom.kt
@@ -1,6 +1,5 @@
 package jp.juggler.subwaytooter.actpost
 
-
 import android.annotation.SuppressLint
 import android.content.Intent
 import android.text.method.LinkMovementMethod
diff --git a/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostPoll.kt b/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostPoll.kt
index 8a03a54b..410fda17 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostPoll.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostPoll.kt
@@ -1,6 +1,5 @@
 package jp.juggler.subwaytooter.actpost
 
-
 import jp.juggler.subwaytooter.ActPost
 import jp.juggler.util.notEmpty
 import jp.juggler.util.vg
diff --git a/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostReply.kt b/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostReply.kt
index 431c3297..4f3ef2aa 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostReply.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostReply.kt
@@ -1,6 +1,5 @@
 package jp.juggler.subwaytooter.actpost
 
-
 import android.view.View
 import androidx.appcompat.app.AlertDialog
 import jp.juggler.subwaytooter.ActPost
diff --git a/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostSchedule.kt b/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostSchedule.kt
index ecc885d4..e77e5752 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostSchedule.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostSchedule.kt
@@ -1,6 +1,5 @@
 package jp.juggler.subwaytooter.actpost
 
-
 import jp.juggler.subwaytooter.ActPost
 import jp.juggler.subwaytooter.R
 import jp.juggler.subwaytooter.api.TootParser
diff --git a/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostVisibility.kt b/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostVisibility.kt
index 0e2a7ed4..b806b0dc 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostVisibility.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostVisibility.kt
@@ -1,6 +1,5 @@
 package jp.juggler.subwaytooter.actpost
 
-
 import androidx.appcompat.app.AlertDialog
 import jp.juggler.subwaytooter.ActPost
 import jp.juggler.subwaytooter.R
diff --git a/app/src/main/java/jp/juggler/subwaytooter/column/Column.kt b/app/src/main/java/jp/juggler/subwaytooter/column/Column.kt
index 4e8f4cfc..028bdb0f 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/column/Column.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/column/Column.kt
@@ -41,7 +41,7 @@ class Column(
 ) {
     companion object {
 
-        internal val log = LogCategory("Column")
+        private val log = LogCategory("Column")
 
         internal const val LOOP_TIMEOUT = 10000L
         internal const val LOOP_READ_ENOUGH = 30 // フィルタ後のデータ数がコレ以上ならループを諦めます
diff --git a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnActions.kt b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnActions.kt
index 91d58cbc..a4ed5122 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnActions.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnActions.kt
@@ -8,10 +8,13 @@ import jp.juggler.subwaytooter.util.BucketList
 import jp.juggler.subwaytooter.util.matchHost
 import jp.juggler.util.AdapterChange
 import jp.juggler.util.AdapterChangeType
+import jp.juggler.util.LogCategory
 import java.util.*
 import kotlin.collections.ArrayList
 import kotlin.collections.set
 
+private val log = LogCategory("ColumnActions")
+
 /*
     なんらかアクションを行った後にカラムデータを更新する処理など
 */
@@ -377,12 +380,12 @@ fun replaceConversationSummary(
             changeList.add(AdapterChange(AdapterChangeType.RangeChange, i, 1))
             listData[i] = newItem
             removeSet.add(newItem.id)
-            Column.log.d("replaceConversationSummary: in-place update")
+            log.d("replaceConversationSummary: in-place update")
         } else {
             // 投稿が異なるので古い方を削除して、リストの順序を変える
             changeList.add(AdapterChange(AdapterChangeType.RangeRemove, i, 1))
             listData.removeAt(i)
-            Column.log.d("replaceConversationSummary: order change")
+            log.d("replaceConversationSummary: order change")
         }
     }
 
diff --git a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnExtra1.kt b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnExtra1.kt
index 2ec93d83..ffa940a8 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnExtra1.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnExtra1.kt
@@ -7,11 +7,14 @@ import jp.juggler.subwaytooter.api.entity.EntityId
 import jp.juggler.subwaytooter.api.entity.TimelineItem
 import jp.juggler.subwaytooter.api.entity.TootStatus
 import jp.juggler.subwaytooter.columnviewholder.ColumnViewHolder
+import jp.juggler.util.LogCategory
 import jp.juggler.util.getAdaptiveRippleDrawable
 import jp.juggler.util.notZero
 import jp.juggler.util.showToast
 import org.jetbrains.anko.backgroundDrawable
 
+private val log = LogCategory("ColumnExtra1")
+
 ///////////////////////////////////////////////////
 // ViewHolderとの連携
 
@@ -155,19 +158,19 @@ fun Column.onActivityStart() {
 
     // 破棄されたカラムなら何もしない
     if (isDispose.get()) {
-        Column.log.d("onStart: column was disposed.")
+        log.d("onStart: column was disposed.")
         return
     }
 
     // 未初期化なら何もしない
     if (!bFirstInitialized) {
-        Column.log.d("onStart: column is not initialized.")
+        log.d("onStart: column is not initialized.")
         return
     }
 
     // 初期ロード中なら何もしない
     if (bInitialLoading) {
-        Column.log.d("onStart: column is in initial loading.")
+        log.d("onStart: column is in initial loading.")
         return
     }
 
@@ -181,7 +184,7 @@ fun Column.onActivityStart() {
     // 始端リフレッシュの最中だった
     // リフレッシュ終了時に自動でストリーミング開始するはず
     if (bRefreshingTop) {
-        Column.log.d("onStart: bRefreshingTop is true.")
+        log.d("onStart: bRefreshingTop is true.")
         return
     }
 
@@ -191,7 +194,7 @@ fun Column.onActivityStart() {
         !dontAutoRefresh
     ) {
         // リフレッシュしてからストリーミング開始
-        Column.log.d("onStart: start auto refresh.")
+        log.d("onStart: start auto refresh.")
         startRefresh(bSilent = true, bBottom = false)
     } else if (isSearchColumn) {
         // 検索カラムはリフレッシュもストリーミングもないが、表示開始のタイミングでリストの再描画を行いたい
diff --git a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnExtra2.kt b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnExtra2.kt
index 40e86b8b..0f112bde 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnExtra2.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnExtra2.kt
@@ -4,7 +4,6 @@ import android.content.Context
 import android.os.Environment
 import androidx.annotation.RawRes
 import jp.juggler.subwaytooter.*
-import jp.juggler.subwaytooter.column.Column.Companion.log
 import jp.juggler.subwaytooter.api.TootApiClient
 import jp.juggler.subwaytooter.api.TootApiResult
 import jp.juggler.subwaytooter.api.TootParser
@@ -14,6 +13,8 @@ import jp.juggler.util.*
 import java.io.File
 import java.util.*
 
+private val log = LogCategory("ColumnExtra2")
+
 val Column.isMastodon: Boolean
     get() = accessInfo.isMastodon
 
@@ -170,7 +171,7 @@ suspend fun Column.updateRelation(
 ) {
     if (accessInfo.isPseudo) return
 
-    val env = UpdateRelationEnv(this)
+    val env = UserRelationLoader(this)
 
     env.add(whoRef)
 
diff --git a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnFilters.kt b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnFilters.kt
index b22e1321..b1f288de 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnFilters.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnFilters.kt
@@ -11,12 +11,11 @@ import jp.juggler.subwaytooter.table.FavMute
 import jp.juggler.subwaytooter.table.HighlightWord
 import jp.juggler.subwaytooter.table.SavedAccount
 import jp.juggler.subwaytooter.table.UserRelation
-import jp.juggler.util.AdapterChange
-import jp.juggler.util.AdapterChangeType
-import jp.juggler.util.WordTrieTree
-import jp.juggler.util.launchMain
+import jp.juggler.util.*
 import java.util.regex.Pattern
 
+private val log = LogCategory("ColumnFilters")
+
 val Column.isFilterEnabled: Boolean
     get() = withAttachment ||
         withHighlight ||
@@ -152,7 +151,7 @@ fun Column.initFilter() {
                     }
                 }
         } catch (ex: Throwable) {
-            Column.log.trace(ex)
+            log.trace(ex)
         }
     }
 
@@ -177,7 +176,7 @@ fun Column.isFiltered(status: TootStatus): Boolean {
     val filterTrees = keywordFilterTrees
     if (filterTrees != null) {
         if (status.isKeywordFiltered(accessInfo, filterTrees.treeIrreversible)) {
-            Column.log.d("status filtered by treeIrreversible")
+            log.d("status filtered by treeIrreversible")
             return true
         }
 
@@ -297,7 +296,7 @@ fun Column.isFiltered(item: TootNotification): Boolean {
             }
         }
     ) {
-        Column.log.d("isFiltered: ${item.type} notification filtered.")
+        log.d("isFiltered: ${item.type} notification filtered.")
         return true
     }
 
@@ -305,7 +304,7 @@ fun Column.isFiltered(item: TootNotification): Boolean {
     val filterTrees = keywordFilterTrees
     if (status != null && filterTrees != null) {
         if (status.isKeywordFiltered(accessInfo, filterTrees.treeIrreversible)) {
-            Column.log.d("isFiltered: status muted by treeIrreversible.")
+            log.d("isFiltered: status muted by treeIrreversible.")
             return true
         }
 
@@ -315,7 +314,7 @@ fun Column.isFiltered(item: TootNotification): Boolean {
     if (checkLanguageFilter(status)) return true
 
     if (status?.checkMuted() == true) {
-        Column.log.d("isFiltered: status muted by in-app muted words.")
+        log.d("isFiltered: status muted by in-app muted words.")
         return true
     }
 
@@ -334,7 +333,7 @@ fun Column.isFiltered(item: TootNotification): Boolean {
         TootNotification.TYPE_FOLLOW_REQUEST_ACCEPTED_MISSKEY -> {
             val who = item.account
             if (who != null && favMuteSet?.contains(accessInfo.getFullAcct(who)) == true) {
-                Column.log.d("${accessInfo.getFullAcct(who)} is in favMuteSet.")
+                log.d("${accessInfo.getFullAcct(who)} is in favMuteSet.")
                 return true
             }
         }
@@ -424,7 +423,7 @@ fun reloadFilter(context: Context, accessInfo: SavedAccount) {
         }
 
         resultList?.let {
-            Column.log.d("update filters for ${accessInfo.acct.pretty}")
+            log.d("update filters for ${accessInfo.acct.pretty}")
             for (column in App1.getAppState(context).columnList) {
                 if (column.accessInfo == accessInfo) {
                     column.onFiltersChanged2(it)
diff --git a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnSpec.kt b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnSpec.kt
index 1df7e36a..3f523ca2 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnSpec.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnSpec.kt
@@ -4,6 +4,9 @@ import jp.juggler.subwaytooter.api.entity.Acct
 import jp.juggler.subwaytooter.api.entity.EntityId
 import jp.juggler.subwaytooter.api.entity.Host
 import jp.juggler.subwaytooter.table.SavedAccount
+import jp.juggler.util.LogCategory
+
+private val log = LogCategory("ColumnSpec")
 
 object ColumnSpec {
 
@@ -161,7 +164,7 @@ object ColumnSpec {
                 else -> true
             }
         } catch (ex: Throwable) {
-            Column.log.trace(ex)
+            log.trace(ex)
             false
         }
     }
diff --git a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnStreaming.kt b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnStreaming.kt
index 879380d4..99855934 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnStreaming.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnStreaming.kt
@@ -4,30 +4,28 @@ import android.os.SystemClock
 import jp.juggler.subwaytooter.*
 import jp.juggler.subwaytooter.api.TootApiClient
 import jp.juggler.subwaytooter.api.entity.*
-import jp.juggler.subwaytooter.column.*
 import jp.juggler.subwaytooter.columnviewholder.*
 import jp.juggler.subwaytooter.notification.PollingWorker
 import jp.juggler.subwaytooter.streaming.StreamManager
 import jp.juggler.subwaytooter.streaming.StreamStatus
 import jp.juggler.subwaytooter.util.ScrollPosition
-import jp.juggler.util.AdapterChange
-import jp.juggler.util.AdapterChangeType
-import jp.juggler.util.notEmpty
-import jp.juggler.util.runOnMainLooper
+import jp.juggler.util.*
 import kotlin.math.max
 import kotlin.math.min
 
+private val log = LogCategory("ColumnStreaming")
+
 // 別スレッドから呼ばれるが大丈夫か
 fun Column.canStreamingState() = when {
     // 未初期化なら何もしない
     !bFirstInitialized -> {
-        if (StreamManager.traceDelivery) Column.log.v("canStartStreaming: column is not initialized.")
+        if (StreamManager.traceDelivery) log.v("canStartStreaming: column is not initialized.")
         false
     }
 
     // 初期ロード中なら何もしない
     bInitialLoading -> {
-        if (StreamManager.traceDelivery) Column.log.v("canStartStreaming: is in initial loading.")
+        if (StreamManager.traceDelivery) log.v("canStartStreaming: is in initial loading.")
         false
     }
 
@@ -109,7 +107,7 @@ fun Column.mergeStreamingMessage() {
         } catch (ex: Throwable) {
             // IDを取得できないタイプのオブジェクトだった
             // ストリームに来るのは通知かステータスだから、多分ここは通らない
-            Column.log.trace(ex)
+            log.trace(ex)
         }
     }
 
@@ -136,7 +134,7 @@ fun Column.mergeStreamingMessage() {
                 restoreIdx = holder.findFirstVisibleListItem()
                 restoreY = holder.getListItemOffset(restoreIdx)
             } catch (ex: IndexOutOfBoundsException) {
-                Column.log.w(ex, "findFirstVisibleListItem failed.")
+                log.w(ex, "findFirstVisibleListItem failed.")
                 restoreIdx = -2
                 restoreY = 0
             }
@@ -201,7 +199,7 @@ private fun Column.addGapAfterStreaming(listNew: ArrayList<TimelineItem>, newIdM
             }
         }
     } catch (ex: Throwable) {
-        Column.log.e(ex, "can't put gap.")
+        log.e(ex, "can't put gap.")
     }
 }
 
@@ -220,24 +218,24 @@ private fun Column.scrollAfterStreaming(added: Int, holderSp: ScrollPosition?, r
         when {
             holderSp == null -> {
                 // スクロール位置が先頭なら先頭にする
-                Column.log.d("mergeStreamingMessage: has VH. missing scroll position.")
+                log.d("mergeStreamingMessage: has VH. missing scroll position.")
                 viewHolder?.scrollToTop()
             }
 
             holderSp.isHead -> {
                 // スクロール位置が先頭なら先頭にする
-                Column.log.d("mergeStreamingMessage: has VH. keep head. $holderSp")
+                log.d("mergeStreamingMessage: has VH. keep head. $holderSp")
                 holder.setScrollPosition(ScrollPosition())
             }
 
             restoreIdx < -1 -> {
                 // 可視範囲の検出に失敗
-                Column.log.d("mergeStreamingMessage: has VH. can't get visible range.")
+                log.d("mergeStreamingMessage: has VH. can't get visible range.")
             }
 
             else -> {
                 // 現在の要素が表示され続けるようにしたい
-                Column.log.d("mergeStreamingMessage: has VH. added=$added")
+                log.d("mergeStreamingMessage: has VH. added=$added")
                 holder.setListItemTop(restoreIdx + added, restoreY)
             }
         }
@@ -251,7 +249,7 @@ fun Column.runOnMainLooperForStreamingEvent(proc: () -> Unit) {
 }
 
 fun Column.onStreamStatusChanged(status: StreamStatus) {
-    Column.log.d(
+    log.d(
         "onStreamStatusChanged status=$status, bFirstInitialized=$bFirstInitialized, bInitialLoading=$bInitialLoading, column=${accessInfo.acct}/${
             getColumnName(true)
         }"
@@ -268,7 +266,7 @@ fun Column.onStreamStatusChanged(status: StreamStatus) {
 }
 
 fun Column.onStreamingTimelineItem(item: TimelineItem) {
-    if (StreamManager.traceDelivery) Column.log.v("${accessInfo.acct} onTimelineItem")
+    if (StreamManager.traceDelivery) log.v("${accessInfo.acct} onTimelineItem")
     if (!canHandleStreamingMessage()) return
 
     when (item) {
@@ -368,7 +366,7 @@ fun Column.onMisskeyNoteUpdated(ev: MisskeyNoteUpdate) {
     // （でないとリアクションの2重カウントなどが発生してしまう)
     val myId = EntityId.from(accessInfo.token_info, TootApiClient.KEY_USER_ID)
     if (myId == null) {
-        Column.log.w("onNoteUpdated: missing my userId. updating access token is recommenced!!")
+        log.w("onNoteUpdated: missing my userId. updating access token is recommenced!!")
     }
 
     val byMe = myId == ev.userId
diff --git a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnTask_Gap.kt b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnTask_Gap.kt
index 96e24c81..1636faa1 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnTask_Gap.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnTask_Gap.kt
@@ -5,7 +5,6 @@ import jp.juggler.subwaytooter.*
 import jp.juggler.subwaytooter.api.*
 import jp.juggler.subwaytooter.api.entity.*
 import jp.juggler.subwaytooter.api.finder.*
-import jp.juggler.subwaytooter.column.*
 import jp.juggler.subwaytooter.columnviewholder.getListItemOffset
 import jp.juggler.subwaytooter.columnviewholder.setListItemTop
 import jp.juggler.subwaytooter.notification.PollingWorker
@@ -151,12 +150,12 @@ class ColumnTask_Gap(
                     try {
                         restoreY = holder.getListItemOffset(restoreIdx)
                     } catch (ex: IndexOutOfBoundsException) {
-                        Column.log.w(ex, "getListItemOffset failed.")
+                        log.w(ex, "getListItemOffset failed.")
                         restoreIdx = position
                         try {
                             restoreY = holder.getListItemOffset(restoreIdx)
                         } catch (ex2: IndexOutOfBoundsException) {
-                            Column.log.w(ex2, "getListItemOffset failed.")
+                            log.w(ex2, "getListItemOffset failed.")
                             restoreIdx = -1
                         }
                     }
diff --git a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnTask_Loading.kt b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnTask_Loading.kt
index ef17b377..6cc7ec90 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnTask_Loading.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnTask_Loading.kt
@@ -6,9 +6,8 @@ import jp.juggler.subwaytooter.R
 import jp.juggler.subwaytooter.api.*
 import jp.juggler.subwaytooter.api.entity.*
 import jp.juggler.subwaytooter.api.finder.*
-import jp.juggler.subwaytooter.column.*
-import jp.juggler.subwaytooter.notification.PollingWorker
 import jp.juggler.subwaytooter.columnviewholder.scrollToTop
+import jp.juggler.subwaytooter.notification.PollingWorker
 import jp.juggler.subwaytooter.util.OpenSticker
 import jp.juggler.util.*
 import java.util.*
diff --git a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnTask_Refresh.kt b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnTask_Refresh.kt
index ec250125..80aa2332 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnTask_Refresh.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnTask_Refresh.kt
@@ -5,7 +5,6 @@ import jp.juggler.subwaytooter.*
 import jp.juggler.subwaytooter.api.*
 import jp.juggler.subwaytooter.api.entity.*
 import jp.juggler.subwaytooter.api.finder.*
-import jp.juggler.subwaytooter.column.*
 import jp.juggler.subwaytooter.columnviewholder.setScrollPosition
 import jp.juggler.subwaytooter.util.ScrollPosition
 import jp.juggler.util.*
diff --git a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnUrls.kt b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnUrls.kt
index 379641e1..676b4d17 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnUrls.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnUrls.kt
@@ -12,6 +12,8 @@ import jp.juggler.subwaytooter.api.entity.TootStatus
 import jp.juggler.subwaytooter.api.syncAccountByAcct
 import jp.juggler.util.*
 
+private val log = LogCategory("ColumnUrls")
+
 private const val PATH_HOME = "/api/v1/timelines/home?limit=${ApiPath.READ_LIMIT}"
 private const val PATH_LOCAL = "/api/v1/timelines/public?local=true&limit=${ApiPath.READ_LIMIT}"
 
@@ -207,7 +209,7 @@ suspend fun Column.makeHashtagAcctUrl(client: TootApiClient): String? {
             val (result, whoRef) = client.syncAccountByAcct(accessInfo, hashtagAcct)
             result ?: return null // cancelled.
             if (whoRef == null) {
-                Column.log.w("makeHashtagAcctUrl: ${result.error ?: "?"}")
+                log.w("makeHashtagAcctUrl: ${result.error ?: "?"}")
                 return null
             }
             profileId = whoRef.get().id
@@ -351,7 +353,6 @@ fun Column.makeProfileStatusesUrl(profileId: EntityId?): String {
     return path
 }
 
-
 fun StringBuilder.appendHashtagExtra(column: Column): StringBuilder {
     val limit = (Column.HASHTAG_ELLIPSIZE * 2 - kotlin.math.min(length, Column.HASHTAG_ELLIPSIZE)) / 3
     if (column.hashtagAny.isNotBlank()) append(' ').append(
diff --git a/app/src/main/java/jp/juggler/subwaytooter/column/UpdateRelationEnv.kt b/app/src/main/java/jp/juggler/subwaytooter/column/UserRelationLoader.kt
similarity index 90%
rename from app/src/main/java/jp/juggler/subwaytooter/column/UpdateRelationEnv.kt
rename to app/src/main/java/jp/juggler/subwaytooter/column/UserRelationLoader.kt
index 6513ba26..a515f7c2 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/column/UpdateRelationEnv.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/column/UserRelationLoader.kt
@@ -6,11 +6,15 @@ import jp.juggler.subwaytooter.api.entity.*
 import jp.juggler.subwaytooter.table.AcctSet
 import jp.juggler.subwaytooter.table.TagSet
 import jp.juggler.subwaytooter.table.UserRelation
+import jp.juggler.util.LogCategory
 import jp.juggler.util.toJsonArray
 import jp.juggler.util.toPostRequestBuilder
 import java.util.HashSet
 
-class UpdateRelationEnv(val column: Column) {
+class UserRelationLoader(val column: Column) {
+    companion object {
+        private val log = LogCategory("UserRelationLoader")
+    }
 
     val whoSet = HashSet<EntityId>()
     val acctSet = HashSet<String>()
@@ -63,7 +67,7 @@ class UpdateRelationEnv(val column: Column) {
                     UserRelation.saveListMisskey(now, column.accessInfo.db_id, whoList, start, step)
                     start += step
                 }
-                Column.log.d("updateRelation: update $end relations.")
+                log.d("updateRelation: update $end relations.")
             }
 
             // 2018/11/1 Misskeyにもリレーション取得APIができた
@@ -108,7 +112,7 @@ class UpdateRelationEnv(val column: Column) {
                         UserRelation.saveListMisskeyRelationApi(now, column.accessInfo.db_id, list)
                     }
                 }
-                Column.log.d("updateRelation: update $n relations.")
+                log.d("updateRelation: update $n relations.")
             }
         } else {
             // アカウントIDの集合からRelationshipを取得してデータベースに記録する
@@ -137,7 +141,7 @@ class UpdateRelationEnv(val column: Column) {
                         list
                     )
                 }
-                Column.log.d("updateRelation: update $n relations.")
+                log.d("updateRelation: update $n relations.")
             }
         }
 
@@ -156,7 +160,7 @@ class UpdateRelationEnv(val column: Column) {
                 AcctSet.saveList(now, acctList, n, length)
                 n += length
             }
-            Column.log.d("updateRelation: update $n acct.")
+            log.d("updateRelation: update $n acct.")
         }
 
         // 出現したタグをデータベースに記録する
@@ -174,7 +178,7 @@ class UpdateRelationEnv(val column: Column) {
                 TagSet.saveList(now, tagList, n, length)
                 n += length
             }
-            Column.log.d("updateRelation: update $n tag.")
+            log.d("updateRelation: update $n tag.")
         }
     }
 }