Welcome to Sensei Notes. This site is for people who plan their own trips to Japan — the ones who would rather compare the options themselves than buy a package.
I'm Shin. I'm Japanese, I've lived in Tokyo for 18 years, and I read the Japanese-language sources most travel sites cannot: fare tables, tax notices, operator announcements. Then I write what they actually say, not what a press release says they say.
What you will find here: real prices with the date I checked them, honest comparisons that sometimes tell you not to buy, and the practical details guidebooks skip. Is the Japan Rail Pass worth it? An eSIM or a pocket WiFi? Which IC card? Those are the questions this site answers.