Tokyo's first 5-storey wooden structure - an apartment building - is to be built near Shimouma in Setagaya-ku.
Under a revision to the Building Standards Act in 2000, wooden structures over 4 stories are permissible as long as they meet building strength and fire resistant regulations. Prior to this amendment, a law made during the Taisho period (1926 - 1926) limited wooden structures to 3 stories.
Although the amendment was made 12 years ago, it has not been widely taken up by the construction industry. In Tokyo city, just one 4-storey wooden residence was built in Chiyoda-ku in 2011.