Suggestions for chuushaku
The following packages have something in common with the package chuushaku. The packages are ordered in decreasing similarity.
- keisennote: TikZ-based Japanese-style notebook ruled lines for LaTeX
 - notes: Mark sections of a document
 - debate: Debates between reviewers
 - mindflow: Write your ideas in a clear way
 - marginnote: Notes in the margin, even where \marginpar fails
 - versonotes: Display brief notes on verso pages
 - parnotes: Notes after every paragraph (or elsewhere)
 - todo: Make a to-do list for a document
 - easyreview: Package to provide a way to review (or perform editorial process) in LaTeX
 - easy-todo: To-do notes in a document
 - edmargin: Multiple series of endnotes for critical editions
 - fixmetodonotes: Add notes on document development
 - minipage-marginpar: Minipages with marginal notes
 - threeparttable: Tables with captions and notes all the same width
 - threeparttablex: Notes in longtables
 - mbenotes: Notes in tables or images
 - fixme: Collaborative annotation tool for LaTeX
 - pagenote: Notes at end of document
 - zennote: Streamline your note-taking process!
 - unifront: Give notes a unique front page for every chapter and section
 - scrambledenvs: Create and print scrambled environments
 - snaptodo: A todo that snaps to the closer side
 - ezedits: Commands for tracking document changes and notes
 - scrlayer-notecolumn: Control note columns parallel to the main text
 - ktbox: Framework for semantic color, structured highlighting, and scholarly communication
 - notespages: Filling documents with notes pages and notes areas
 - babel-japanese: Babel support for Japanese
 - nidanfloat: Bottom placement option for double float in two column mode (nidan-kumi)
 - asternote: Annotation symbols enclosed in square brackets and marked with an asterisk
 - ascmac: Boxes and picture macros with Japanese vertical writing support
 - jpnedumathsymbols: Mathematical equation representation in Japanese education