A research institute has released a 3-D geological map showing the underground structure of Tokyo's 23 wards designed ... bank of the Tamagawa River in Setagaya Ward also measured about 10 km ...

Around 700 stalls line the street during the annual Setagaya Boroichi, a venerable flea market that's been going on for more than 430 years now. Held twice a year – on December 15-16 and again ...