Keigo & Business Japanese Corrector - Japanese Grammar Checker AI - Fude
Overview
Keigo & business Japanese checker for non-natives in Japan. Fixes keigo & grammar mistakes in Gmail, Slack & Docs as you type.
Reporting to your manager, emailing a client, posting in the team Slack — Fude fixes your keigo mistakes before you hit send. Fude (筆) is a keigo (Japanese honorifics) and business Japanese checker for non-native speakers who work in Japanese. It runs right where you already write: Gmail, Slack, Notion, Google Docs and more. 「拝見させていただきました」「弊社がご説明なさいます」「了解しました」— mistakes that are hard to notice yourself get underlined as you type, with the reason and the correct phrasing explained in your language. ★ WHAT FUDE DOES ★ ✓ Checks for the right reader • Switch the audience between Internal (coworkers) and External (clients) and the same sentence is judged differently • 「拝見させていただきました」 in the team Slack is flagged as over-polite; 「送ります」 to a client is flagged as not polite enough • 3 keigo levels: Casual / Business / Ultra-formal ✓ Fixes keigo mistakes on the spot • Double keigo (拝見させていただく, おっしゃられる) • Mixing up respectful and humble forms (弊社がご説明なさいます) • Set phrases that are wrong at work (了解しました, ご苦労様です) • Particles, Japanese grammar and typos are checked at the same time ✓ Write plainly, convert to keigo (Pro) • Type 「明日の会議、資料を送って」, select it, right-click → a business sentence that fits your audience and keigo level ✓ Works where you already write • Gmail, Slack, Notion, Google Docs and other web editors • Text fields on any page are detected automatically ✓ Explanations in your language • English, 日本語, 中文, 한국어, Español, Português ★ WHO IS FUDE FOR? ★ • Non-native employees at Japanese companies • Anyone unsure whether the keigo in their email to a client is right • Anyone worried about sounding rude to a manager or senior coworker on Slack • Anyone who wants Japanese grammar proofreading along with their keigo ★ FREE vs PRO ★ FREE: 20 AI corrections/day PRO ($9.99/mo): 300 AI corrections/day, keigo conversion of selected text (right-click), tone & email-structure check, custom dictionary ★ PRIVACY ★ Your text is processed securely and never stored permanently. ★ SUPPORT ★ Questions? Contact us at support@increoscale.com
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Details
- Version1.5.0
- UpdatedSeptember 9, 2026
- FeaturesOffers in-app purchases
- Size173KiB
- Languages6 languages
- DeveloperWebsite
Email
support@increoscale.com - Non-traderThis developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.
Privacy
Keigo & Business Japanese Corrector - Japanese Grammar Checker AI - Fude has disclosed the following information regarding the collection and usage of your data. More detailed information can be found in the developer's privacy policy.
Keigo & Business Japanese Corrector - Japanese Grammar Checker AI - Fude handles the following:
This developer declares that your data is
- Not being sold to third parties, outside of the approved use cases
- Not being used or transferred for purposes that are unrelated to the item's core functionality
- Not being used or transferred to determine creditworthiness or for lending purposes