Perum Jasa Tirta I (PJT1) and Indonesia Asahan Aluminium (Inalum) formed two joint teams and visited Japan Water Agency. The joint team-1 & 2 conducted Benchmarking tour from May 19 – 23 and from May 26 – 30 2025, respectively. The number of the Team-1 members was 10 and the one of Team-2 members was 8. The table and the map show their itinerary of the tour and facility locations that they visited.
PJT1 is the Indonesian public corporation responsible for water resources management in five basin areas as of now, namely Brantas BS, Bengawan Solo BS, Jeratun Seluna BS, Bogowonto Serayu BS and Toba Asahan BS.
Inalum is an Indonesian state-owned company specialized in aluminium smelting, the largest aluminium producer company in Indonesia. INALUM was established in 1976 and is based in Asahan Regency, North Sumatra Province, Indonesia. The company manages the huge potential of electricity generated from Asahan River.
Their targets of the tours were to compare O&Ms of their dams and power plants to the ones of Japan.
| Table: Itinerary of Benchmarking Tour |
| Date | Construction Site or O&M Offices | Project Owners |
| May 19/26 | ① Japan Water Agency Head Quarters | ●Japan Water Gency |
| May 20/27 | ② Nanma Dam Construction Site | ●Japan Water Gency |
| May 21/28 | ③ Kusaki Dam O&M Office ④ Takatsudo Power Plant O&M Office |
●Japan Water Gency ●Enterprise Bureau, Gunma Prefecture |
| May 22/29 | ⑤ Shimokubo Dam O&M Office ⑥ Gunma Canal O&M Office ⑦ Tone River Dams Integrated Control Office |
●Japan Water Gency ●Japan Water Gency ●Kanto Regional Bureau, Ministry of Land, Infrastructure, Transport & Tourism |
| May 23/30 | ⑧ Yagisawa Dam ⑨ TEPCO Power Plant O&M Office |
●Japan Water Gency ●Tokyo Electric Power Company |
