the reason japanese pagoda roofs decline in size is
Japanese pagoda The edge of a pagoda's eaves forms a straight line, with each following edge being shorter than the other. The more difference in length (a parameter called teigen (逓減, gradual diminution) in Japanese) between stories, the more solid and secure the pagoda seems to be. Both teigen and the finial are greater in older pagodas, giving them a sense of solidity.[5] Vice versa, recent pagodas tend to be steeper and have shorter finials, creating svelter silhouettes.
Tokyo The mainland portion of Tokyo lies northwest of Tokyo Bay and measures about 90 km (56 mi) east to west and 25 km (16 mi) north to south. The average elevation in Tokyo is 40 m (131 ft).[47] Chiba Prefecture borders it to the east, Yamanashi to the west, Kanagawa to the south, and Saitama to the north. Mainland Tokyo is further subdivided into the special wards (occupying the eastern half) and the Tama area (多摩地域) stretching westwards.