LeakSense JP
A Japanese-language 'did my data leak?' checker and ad-tracker explainer built specifically for LINE users and parents of LINE GAME players.
Japanese consumers and parents of kids who play LINE games and want to know whether their ID was in the 7.1M-record leak
- Safe paste-your-ID checker against the leaked LINE GAME user-ID set with plain-Japanese results
- Plain-language explainer of what 'random-string identifier' does and does not expose
- One-tap walkthrough to revoke ad-ID permissions inside each LINE GAME app's settings
- Push alerts whenever a future breach mentions LINE, Yahoo Japan, LY Corporation, or PayPay
LY Corporation confirmed 7.1M LINE GAME user identifiers leaked to external ad tools on July 13, 2026, and Japanese Twitter is already flooded with confusion and parents worried about their kids' accounts.
Real, well-documented incident: LY Corp disclosed July 13, 2026 that internal identifiers of up to ~7.1M users across 3 LINE games (incl. LINE Pokopoko) leaked to external ad-analytics tools over ~4 years — multiple JP media explainers already treating it as a top consumer-security story.Up to 7.1 Million Personal Identifiers Leaked from 3 LINE Games (LY Corp, July 2026) ↗LINEで発生した個人情報漏洩と流出のまとめ【2026年最新】 ↗
A Japanese-language breach checker (CheckLeaked) already exists with a JP UI and a paid developer API, and multiple JP media explainer hubs (assist-all, rocket-boys) already educate consumers — no clearly dominant LINE-specific parent-facing tool, but the niche is crowded enough to push whitespace below average.データ漏洩検索エンジン＆リークチェッカー — CheckLeaked ↗lineの個人情報流出の原因と最新事例まとめ・被害確認と即効対策方法を徹底解説 ↗
Japanese consumers almost never pay for consumer-grade privacy tooling — the existing JP competitor monetizes via developer/API, not B2C; HIBP survives on donations; willingness to pay for a 'did MY LINE ID leak' check is essentially zero, capping monetization very low.データ漏洩検索エンジン＆リークチェッカー — CheckLeaked ↗
Event-driven utility with chronic one-time use: LY Corp/Leak scandals recur (2023 ~510K, 2024 ~520K, 2026 7.1M), but lookup tools themselves spike and fade with the news cycle; regulatory/structural causes keep demand re-igniting, but traffic is not steady.LINEで発生した個人情報漏洩と流出のまとめ【2026年最新】 ↗
Technically straightforward: hash-lookup pipeline + JP-localized UI + ad-tech glossary; reference content already exists in JP to summarize; ad-tracker explainer is the only non-trivial component. Strong feasibility.Lineで情報漏洩の全知識と最新対応策まとめ｜過去事例と被害防止の実践ポイント ↗