JapanKODOMONO KUNI SWIMMING POOL (Yokohama): ends Aug. 30,10 a.m.-4 p.m., closed Wed., open Aug. 17; water slides and tubes, children’s pool and 25m pool for swimmers at Kodomono Kuni — a natural hiking field and playground in Tama hilly terrain; 1,100 yen adults, 450 yen elementary and junior high school students, 350 yen ages 3-5; 700 Nara-cho, Aoba-ku, Yokohama City; 045-961-2111; www.kodomonokuni.org/index2.html.
TOSHIMAEN SWIMMING POOL (Tokyo): ends Sept. 4, 9 a.m.-5 p.m.; Outdoor waterpark at Toshimaen amusement park has a giant complex of waterslides called Hydro Polis, and seven different types of swimming pools, a diving pool with 1- and 3-meter diving boards and a 50-meter pool for competitive swimmers; one-day pass swimming pool/unlimited rides in amusement park: 4,300 yen adults, 3,300 yen children A (height of 110cm or greater), 2,500 yen for children B (height less than 110cm)/swimming pool pass: 3,800 yen adults, 2,800 yen children A, 1,800 yen children B; 3-25-1 Kouyama, Nerima-ku, Tokyo; Toshima-en Station, Seibu Ikebukuro Line; 03-3990-8800; www.toshimaen.co.jp/pool/index.html (Japanese only).
SEIBU-EN SWIMMING POOL (Saitama prefecture): ends Aug. 31, Sept. 3-4, 9 a.m.-5 p.m.; waterslides. wave pool, floating pool and children’s pool; 2,000 yen adults, 1,000 yen children (1,000 yen adults, 500 yen children July 10-11); 2964 Yamaguchi, Tokorozawa-city, Saitama Prefecture; Seibu Yuenchi Station, Seibu Line; 04-2922-1371; www.seibuen-yuuenchi.jp/ (Japanese only).
TOBU DOBUTSU KOEN (ZOOLOGICAL PARK) SUPER POOL (Saitama prefecture): ends Sept. 4, 9:30 a.m.-5:30 p.m. weekdays, 9:30 a.m.-6 pm. weekends; one-day pass (swimming pool/amusement park/unlimited ride in amusement park): 4,800 yen adults, 3,700 yen children/swimming pool pass: 2,000 yen adults, 1,000 yen children; 110, Suka, Miyashiro-machi Minami Saitama-gun, Saitama; 7.0 km from Kuki I.C., Tohoku Expressway; 0480-93-1200; www.tobuzoo.com/cgi-bin/pc_index.php (Japanese only).
SHOWA KINEN PARK RAINBOW POOL (western Tokyo): ends Sept. 4, 9:30 a.m.-6:30 p.m., until Aug. 21, 9:30 a.m.-6:30 p.m., after Aug. 22, 9:30 a.m.-6 p.m., 9:30 a.m.-5 p.m. on weekdays in Sept.; Rainbow pool — nine different types of swimming pools – is the largest in the metropolitan area; 2,200 yen adults, 1,200 yen elementary and junior high school students, 300 yen ages 4-5, after 2 p.m., 1,100 yen, 600 yen and 150 yen for each; 3173 Midori-cho, Tachikawa City, Tokyo; Nishi-Tachikawa Station, JR Ome Line; 042-528-1751; www.showakinenpark.go.jp/english/index.htm.
OISO LONG BEACH (Kanagawa prefecture): ends Sept. 11, 9 a.m.-5 p.m.; Oiso Prince Hotel’s swimming pools along the coast of Sagami Bay; one-day pass: 3,500 yen adults, 2,500 yen junior high/high school students, 2,000 yen elementary school students, 1,000 yen ages 3-6 and after 2 p.m. it is 2,500 yen, 1,500 yen, 1,000 yen and 500 yen for each; 546 Kokufu Hongo, Oiso Town, Naka-gun, Kanagawa Prefecture; free shuttle from Oiso Station, JR Tokaido Line; 0463-61-1111; www.princehotels.co.jp/pool/oiso/index.html (Japanese only).
YOMIURI LAND WATER AMUSEMENT ISLAND WAI (Tokyo): Aug. 1-31, on weekdays, 9:30 a.m.-5:30 p.m., on weekends, 9 a.m.-5:30 p.m., through Aug. 31, on weekends, 5-9 p.m., Sept. 1-11 weekdays, 10 a.m.-5 p.m., weekends, 9 a.m.-5 p.m., closed Sept. 6; outdoor waterpark with three different types of slides, including the Giant Sky River — a huge complex of slides — also diving boards, swimming pool, wave pool, children’s pool and 250-meter whirlpool; one-day pass (swimming pool/amusement park/unlimited ride in amusement park/seal show): 4,500 yen adults, 3,500 yen children/swimming pool pass: 2,800 yen adults, 1,800 yen children, 500 yen for night swimming, 5-9 p.m.; 4015-1, Yanokuchi, Inagi City, Tokyo; 5 km from Chofu I.C., Chuo Expressway; 044-966-1111; www.yomiuriland.co.jp/english/wai/index.html.
TOKYO SUMMERLAND GREAT JOURNEY/ADVENTURE LAGOON (western Tokyo): ends Sept. 30, 10 a.m.-5 p.m. weekdays, 9 a.m.-6 p.m. weekends and Japanese holidays, 9 a.m.-9 p.m. Aug. 1-31; this outdoor waterpark has pools, waterslides and tubes, waterfalls and more in a tropical atmosphere; admission for Summerland (including Adventure Lagoon) is 3,500 yen adults, 2,500 yen children and a one-day pass including swimming pool/unlimited rides in amusement park is 4,500 yen, 3,000 yen children, 2,000 yen infants & seniors; 600 Kamiyotsugi, Akiruno-city, Tokyo; 0.5 km from Akiruno I.C., Ken-o-do Expressway; 042-558-6511; www.summerland.co.jp/index.html.