diff --git a/katrain/i18n/locales/jp/LC_MESSAGES/katrain.mo b/katrain/i18n/locales/jp/LC_MESSAGES/katrain.mo
index e83515d..e1bad74 100644
Binary files a/katrain/i18n/locales/jp/LC_MESSAGES/katrain.mo and b/katrain/i18n/locales/jp/LC_MESSAGES/katrain.mo differ
diff --git a/katrain/i18n/locales/jp/LC_MESSAGES/katrain.po b/katrain/i18n/locales/jp/LC_MESSAGES/katrain.po
index 2c245f2..7901826 100644
--- a/katrain/i18n/locales/jp/LC_MESSAGES/katrain.po
+++ b/katrain/i18n/locales/jp/LC_MESSAGES/katrain.po
@@ -680,48 +680,37 @@ msgstr ""
 msgid "alternative analysis"
 msgstr "他の候補手を分析中"
 
-#. TODO - ignore moves if timer is on and less than this is used
+#. ignore moves if timer is on and less than this is used
 msgid "minimal time use"
-msgstr "Minimal time use in byo-yomi (s)"
+msgstr "早打ち禁止秒数"
 
-#. TODO
 msgid "move too fast"
-msgstr "Think for at least {num} seconds before playing."
+msgstr "早打ちすぎです。{num}秒は考えてください。"
 
-#. TODO - in minutes
+#. in minutes
 msgid "main time"
-msgstr "Main time (min.)"
+msgstr "持ち時間（分）"
 
-#. TODO - TODO
 msgid "aihelp:simple"
 msgstr ""
-"Plays moves that lead to simplifying the board state. Of moves that lose at "
-"most 'max_points_lost' points and with at least 'min_visits', prefer moves "
-"that lose fewer points, settle own territory more (with importance "
-"settled_weight), settle opponent's territory more (importance settled_weight"
-" * opponent fac), avoid tenuki (more than 5 spaces, importance "
-"tenuki_penalty), and avoid attachments (importance attachment_penalty). "
-"Weights can be negative to make it complicate the game instead, andwide root"
-" noise (in general settings) can be used to further play according to the "
-"style at the cost of strength. "
+"盤面の単純化をめざして, 次の基準で手を選びます (括弧内は重視度): 損する目数が少ない, 自分の確定地が多い (settled_weight), "
+"相手も確定地が多い (settled_weight × opponent fac), 相手が打った手の近辺…縦横とも3間以内 "
+"(tenuki_penalty), 相手の石に接触しない (attachment_penalty). ただし, 損が大きすぎたり "
+"(max_points_lost目以上) 探索手数が少なすぎたり (min_visits手未満) する候補手は除きます. 重視度を負にすれば, "
+"逆に盤面の複雑化をめざします. また, 一般設定のwide root noiseを大きくすれば, 強さは犠牲になりますが, "
+"より前述の基準に忠実な打ち方をします."
 
-#. TODO
 msgid "ai:simple"
-msgstr "Simple Style"
+msgstr "簡明派"
 
-#. TODO
 msgid "aihelp:settle"
 msgstr ""
-"Plays moves that lead to clarity on stones' status, favouring solid moves "
-"rather than complex sabaki. Of moves that lose at most 'max_points_lost' "
-"points and with at least 'min_visits', prefer moves that lose fewer points, "
-"settle own stones more (with importance settled_weight), settle opponent's "
-"stones more (importance settled_weight * opponent fac), avoid tenuki (more "
-"than 5 spaces, importance tenuki_penalty), and avoid attachments (importance"
-" attachment_penalty). Weights can be negative to make it complicate the game"
-" instead, and wide root noise (in general settings) can be used to further "
-"play according to the style at the cost of strength. "
+"複雑なサバキよりも, 石の生死をはっきりさせる堅実な手を好みます. 具体的には, 次の基準で手を選びます (括弧内は重視度): 損する目数が少ない, "
+"自分の生死が明確 (settled_weight), 相手の生死も明確 (settled_weight × opponent fac), "
+"相手が打った手の近辺…縦横とも3間以内 (tenuki_penalty), 相手の石に接触しない (attachment_penalty). ただし, "
+"損が大きすぎたり (max_points_lost目以上) 探索手数が少なすぎたり (min_visits手未満) する候補手は除きます. "
+"重視度を負にすれば, 逆に盤面の複雑化をめざします. また, 一般設定のwide root noiseを大きくすれば, 強さは犠牲になりますが, "
+"より前述の基準に忠実な打ち方をします."
 
-#. TODO
 msgid "ai:settle"
-msgstr "Settle Style"
+msgstr "堅実派"