In many parts of Japan, tulips bloom around the April to May timeframe. If you're visiting earlier than that and want to get your flower fix, there is a way – at the Tulip Fair at Okinawa Ocean Expo Park.
The milder climate in this part of the country sees tulips bloom during the January and February timeframe, and there are around 80,000 of them in approximately 50 varieties to enjoy at this event.
This is a paid event, with admission priced at 760 JPY for adults at the time of writing (counted as anyone high school aged and above), and free for those under high school age.