Shinrin Koen I present you the best park around Tokyo: Shinrin Koen in Chiba - 60km, only an hour drive from Tokyo. There's just so much to do there, really great for kids. To move around, either use the little shuttle train, or best, rent bicycles as the park is huge.
Toppan Building Micro 4/3 are convenient to carry and easy to use but my 5Dmk3 still beats them easily in terms of photo quality. Even when shooting random building like this one.