Only the current version so far — new entries appear as the app ships updates.
メモ帳 - 国産メモアプリ・シンプルメモ is a productivity app by Ryoichi Fukugawa with 500,000+ downloads (about 656K estimated). +1.2K installs in the last 7 days. Install growth, rank history, SDKs and ad networks.
From the store listing: “A simple and easy-to-use memo pad app made in Japan. This free memo app allows you to easily create memos and notebooks and efficiently manage them with folders.”