There are some translation issues in Japanese environment. Please see below:

[Menu]
"Check for Update..." = "アップデートを確認"
"Install Command Line Tool" = "コマンドラインツールをインストール"
"SourceTree Website..." = "SourceTree の Web サイト..."
"Atlassian Website..." = "Atlassian の Web サイト..."
"Bookmark Open Repositories..." = "開いているリポジトリをブックマーク..."
"Add Remote..." = "リモートを追加..."
"Open in Terminal" = "ターミナルで開く"
"Continue [Action]" = "継続 [アクション]"
"Abort [Action]" = "中止 [アクション]"

[Preferences - General]
"Terminal App" = "ターミナルアプリ"
"Language" = "言語"
"Always display full console output" = "すべてのコンソール出力を常に表示する"

[Preferences - Diff]
"Ignore File Patterns" = "無視ファイルのパターン:"

[Preferences - Mercurial]
"Use Graft instead of Transplant if available" = "利用可能なら、Transplant ではなく Graft を使用"

[Preferences - Git]
"Push all tags to remotes" = "リモートへタグをすべてプッシュする"

[Preferences - Custom Action]
"Custom Actions Defined:" = "カスタムアクションの定義:"

[Repository view - Settings - Remotes]
"Remote name:" = "リモートの名前"
"Default remote" = "デフォルトにする"
"URL / path:" = "URL / パス:"

[Repository view - Settings - Advanced]
"Advanced" = "高度な設定"
"Commit Text Replacement" = "コミット文字列の置換"

"Replacement Type:" = "置換タイプ:"
"Project Prefix:" = "プロジェクトプレフィックス"
"Hosting URL:" = "ホスティング URL:"
"Other" = "その他"