Tokyo — JST year-round, no DST
Tokyo runs on JST (UTC+9) year-round with no DST. Same offset as Osaka, Sapporo, Fukuoka. Also same offset as Seoul (KST). Business hours 9 AM - 6 PM formally but presence culture stretches this to 7-8 PM at large employers. TSE (Tokyo Stock Exchange) trading runs 9 AM - 3 PM JST with a 1-h lunch break. Tokyo is 14 h ahead of New York (winter) / 13 h (summer).