8 Things To Do In Japan This April. posted by John Spacey, February 24, April is the height of Spring activity in Japan. The month starts in cherry blossom. And there are plenty of other reasons to visit Japan's capital, from traditional festivals to In , Golden Week will run from 27 April to 6 May. Strawberry Dessert Buffet. If you think cherry blossoms are the only thing that Japan offers during spring, From fruit picking in Chiba to admiring tulips at Kamiyubetsu Tulip Park, there is just so much to do! Best time to visit: Late March to early April.