This is an add-on for Halnote which is a word processor with a user friendly interface ("writing aid"). In Japanese: 簡単操作の文章作成ソフト
Requires the HALNOTE's cartridge to run. The enclosed Install disk does not run by itself but when combined with HALNOTE's system disk, yields two work disks called Personal and Business optimized for household and workplace applications respectively.
Was ported to various word processors and electronic planners. Official website with the Windows and Android version downloads: http://www.teglet.co.jp/naoko/
Developer's blog entry about the MSX ver: http://www.teglet.co.jp/blog/?p=3395