Preparing a Japanese version of your web app? Check what happens after a user types Japanese, not only whether the interface has been translated. This English-language download contains 24 manual test cases covering Japanese text entry, width variants, Unicode, length limits, persistence, search, export, localized errors, and real IME composition. Each case includes exact inputs, steps, and product-dependent expected results. It also includes an editable results sheet, a bug-report template, and three clearly fictional worked examples. Plain Markdown and UTF-8 CSV files. No installation, account connection, or subscription is required. A real Japanese IME is required for the composition cases. This is a functional testing resource. It is not an automated scanner, translation service, quality certification, or replacement for native Japanese linguistic and contextual review. Adapt acceptance criteria to your product; some cases may not apply. Created with AI assistance. Licensed for use within the purchaser's team and client QA projects; resale or redistribution of the blank kit is prohibited. 日本語版を準備する海外Web/SaaS/Game開発チーム向けの、英語の日本語入力QAテストケース集です。24ケース、記録シート、不具合報告ひな形、架空の報告例3件を収録。日本語表現の自然さを判定する商品ではなく、自動検査ツールでもありません。