| Tournament information | |
|---|---|
| Location | Kasaoka, Okayama, Japan |
| Established | 1971 |
| Course(s) | JFE Setonaikai Golf Club |
| Par | 72 |
| Length | 7,461 yards (6,822 m) |
| Tour(s) | Japan Golf Tour |
| Format | Stroke play |
| Prize fund | ¥80,000,000 |
| Month played | May |
| Tournament record score | |
| Aggregate | 266 Norio Suzuki (1980) |
| To par | −20 as above |
| Current champion | |
 Ryosuke Kinoshita | |
| Location map | |
  Setonaikai Golf Club Location in Japan  Setonaikai Golf Club Location in the Okayama Prefecture | |
The Mizuno Open (ミズノオープン, Mizuno ōpun) is a professional golf tournament played in Japan. Founded in 1971, it has been a Japan Golf Tour event since 1979. Since 1998, the event has been prefixed Gateway to The Open (全英への道, Zen'ei eno michi), with the top finishers gaining exemptions into The Open Championship.
The Mizuno Open has been held at several courses, most recently at Setonaikai Golf Club in Kasaoka, Okayama in 2021.
The purse for the 2021 event was ¥80,000,000, with ¥16,000,000 going to the winner.