Tokyo is exactly 1 hour ahead of Singapore year-round. When it's 3:00 PM in Singapore, it's 4:00 PM in Tokyo. Neither city observes daylight saving time.
Tokyo uses Japan Standard Time (JST, UTC+9) while Singapore uses Singapore Standard Time (SGT, UTC+8). The 1-hour difference is consistent throughout the year.
Optimal meeting window: 9:00 AM - 5:00 PM Singapore time (10:00 AM - 6:00 PM Tokyo). Business hours overlap almost entirely with just a 1-hour offset.
Tokyo and Singapore are both major Asian financial centers with extensive business ties in banking, technology, and trade.