Worked for famous Japanese data platform for a few years. The Japanese engineers were collegial but some who didn't come in to the office were actually Hikikomori focused on very narrow things and were very nitpicky about details that wouldn't have ultimately mattered. Those that came into the Tokyo office lived to work and I saw people regularly sleeping at their desk after having stayed out all night for obligatory whiskey outing with colleagues and arriving at the office at 6 am as expected. The San Fran office was the opposite, very sloppy standards people, getting in at noon and staying up late to meet deadlines. The impedence mismatch between the two environments was almost unbearable.