Lake Tama - Tamako

This artificial lake is located in the Sayama Hills in the northern part of Higashiyamato City, Tokyo. Its official name is Murayama Reservoir, and it is divided into a lower reservoir on the east side and an upper reservoir on the west side by a 318-meter-long dam in the middle. It was completed between 1924 and 1927 (Taisho 13 and Showa 2). It has a circumference of about 17 kilometers and a total storage capacity of about 14.82 million cubic meters. Together with Lake Sayama (Yamaguchi Reservoir, Tokorozawa City, Saitama Prefecture) to the northwest, it is a water source for the Tokyo Metropolitan water supply. The Kitagawa River, which flowed through the hills, was dammed to create a reservoir that takes in water from the Tama River at Hamura Weir. The surrounding area is gently undulating and has mixed forests, and has been designated as Sayama Nature Park as a great place for family walks. The Seibu Railway Tamako Line and Seibuen Line run through the area. The northern part of the area belongs to Tokorozawa City, Saitama Prefecture, and the Seibu Dome (baseball stadium) and Seibuen Amusement Park are located near Seibu-Kyōjōmae Station, the terminus of the Seibu Railway Sayama Line.

[Kiyoshi Sawada]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

東京都東大和市(ひがしやまとし)北部の狭山丘陵(さやまきゅうりょう)にある人造湖。正式名称は村山貯水池で、中央の長さ318メートルの堰堤(えんてい)を境に東側の下貯水池と西側の上貯水池に分かれる。1924～1927年（大正13～昭和2）に完成。周囲約17キロメートル、総貯水量約1482万立方メートル。北西方の狭山湖（山口貯水池、埼玉県所沢市）とともに都民の上水道用水源地。丘陵を流れていた北川(きたがわ)をせき止め、多摩川の水を羽村堰(はむらぜき)で取水する貯水池をつくった。付近一帯は緩やかな起伏のなかに雑木林があり、家族向けの散策地として都立狭山自然公園に指定されている。西武鉄道多摩湖線・西武園線が通じる。なお、北側は埼玉県所沢市に属し、西武鉄道狭山線の終点西武球場前駅近くに西武ドーム（球場）、西武園ゆうえんちがある。

［沢田　清］

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