This spring, I compiled an article on the use of all caps in English texts for the Society for Writers, Editors, and Translators (SWET). The article provides an overview of the customary use of all caps (or “full caps”) as well as major style guides’ rules regarding their use. Appropriate use of all caps in brand names, company names, and personal names is also covered. The article is available in English and Japanese and will hopefully reduce some of the well-intentioned—but often over-zealous—use of all caps in Japan.
All Caps: A Practical Guide
https://swet.jp/columns/article/all_caps_a_practical_guide/_C38