Japan Changes Monthly is a paid monthly newsletter for foreign residents of Japan. Once a month it lists the rule changes and deadlines that land next month: visa fees and residence procedures, tax and the year-end adjustment, pension and health insurance, work and wages, utilities and prices, and benefits. Each item says who it affects, from when, what to do, and which official page it comes from.
Japanese ministries publish a long stream of notices every week, almost all of them in Japanese. Only a few need anything from you. The newsletter finds those few and explains them in plain English, naming the office you deal with, the form involved, and whether an English page exists.