HaraMemo
A secure, timestamped logbook for people in Japan dealing with harassment via LINE and other messengers — captures evidence the new Premium Block feature could otherwise erase, with one-tap export formatted for Japanese police.
People in Japan experiencing harassment, stalking, or unwanted contact from ex-partners and acquaintances who need durable evidence
- Tamper-evident message archive: screenshots and forwarded messages are hashed and timestamped locally before storage so the chain of custody holds
- Risk pattern detector: flags escalation signals like late-night messaging, repeated location probing, or third-party contact attempts
- Police-ready export: generates a formatted koban-style PDF (日付・内容・送信者情報) accepted by Japanese police stations
- Survivor-first design: PIN-locked vault, panic wipe, and decoupled operation so users can still log messages after they block the sender
LINE's new Premium Block feature sparked JP debate specifically because it lets a sender silently remove you from their friend list and hides all messages — advocates warn it could be used to erase evidence in ongoing harassment and stalking cases, creating immediate need for an independent evidence tool.
Japan recorded 22,881 stalking consultations in 2025 (+16.9% YoY) and the July 2026 LINE Premium Block announcement triggered widespread press debate explicitly citing 証拠隠滅 (evidence destruction) in stalking/harassment cases — concrete and growing demand.令和7年のDV相談・ストーカー被害・児童虐待への警察対応状況を公表 ↗Lineプレミアムブロックの賛否が割れる理由を4つの視点で整理 ↗
水越法律事務所 already built and freely distributes a client-side LINE evidence app (.txt → court-ready PDF) and multiple law-firm/PI guides exist; HaraMemo would need clear differentiation (Premium Block framing, police-formatted export) to stand out in a crowded free-tools field.Lineのやりとりを証拠にしたい —— 弁護士が本気で作った証拠化アプリ ↗
Direct competitor is lawyer-built and free; users are often victims in financial distress, and the Japanese legal-aid ecosystem already subsidizes evidence preparation — low willingness-to-pay for a B2C app makes B2B (law firms) the only realistic monetization path.Lineのやりとりを証拠にしたい —— 弁護士が本気で作った証拠化アプリ ↗Line・DMをハラスメントの証拠として残すコツ ↗
Stalking in Japan has risen sharply for years and Premium Block activates a multi-year debate, but LY Corp could ship its own evidence-export feature or regulators could mandate evidence preservation, eroding the niche quickly.令和7年のDV相談・ストーカー被害・児童虐待への警察対応状況を公表 ↗Line新機能「プレミアムブロック」とは？使う側のメリット・デメリット ↗
Building a wrapper around LINE's manual .txt backup export is straightforward, but true one-tap continuous logging is blocked by iOS/Android sandboxing (no background access to LINE DB) — practical version is a semi-manual importer, which reduces value vs. existing free tools.Lineのやりとりを証拠にしたい —— 弁護士が本気で作った証拠化アプリ ↗