J-Drama Pilgrimage | サイレーン Siren (2015) — あらかわ遊園 / Satomi Meets Ai & Rena

Drama: カンテレ／フジテレビ『サイレーン 刑事×彼女×完全悪女』 / Siren (2015), limited to the original nine-episode 2015 television series.

Episode 5, broadcast 17 November 2015, uses あらかわ遊園 / Arakawa Yuen for the scene in which Shinobu Satomi talks with Ai and Rena on a flight of steps. The Nationwide Filming Location Guide identifies the amusement park directly and gives the scene coordinate as 35.754072, 139.758377. That pin is stored as the documented stair-area anchor; it should not be read as a claim that the exact 2015 stair configuration, actor positions, or camera setup survives unchanged.

The site is especially worth treating carefully as a then-versus-now pilgrimage. Arakawa City says the amusement park was renewed and reopened in fiscal 2022. Its current official information lists the address as 6-35-11 Nishi-Ogu, Arakawa-ku, with normal opening hours of 09:00–17:00, later on designated evening-opening days, and regular Tuesday closures subject to holiday and school-vacation exceptions. Visitors should check the current calendar and admission rules before going.

Why it matters: the location gives a verifiable public stop for the investigative thread involving Ai and Rena while also illustrating how filming sites can change substantially after a drama airs.