Only the current version so far — new entries appear as the app ships updates.
パスワード付きメモ帳 パスワードロックでメモに鍵をかけよう! is a productivity app by Tech Teria with 1,000+ downloads (about 3.5K estimated). +176 installs in the last 7 days. Install growth, rank history, SDKs and ad networks.
From the store listing: “A simple memo pad app that allows you to lock your notes with a password lock. Manage your important memos with a password lock! Supports folders, color coding, sorting, and OCR”