The 2018 LPGA of Japan Tour was the 51st season of the LPGA of Japan Tour, the professional golf tour for women operated by the Ladies Professional Golfers' Association of Japan. The 2018 schedule included 38 official events.
Leading money winner was Ahn Sun-ju with ¥180,784,885. Jiyai Shin won the Mercedes Ranking. Ai Suzuki had the lowest scoring average. Mamiko Higa finished most often (18 times) inside the top-10.[1]
The number in parentheses after winners' names show the player's total number wins in official money individual events on the LPGA of Japan Tour, including that event. All tournaments were played in Japan.
| Dates | Tournament | Location | Prize fund (¥) | Winner | WWGR pts | |
|---|---|---|---|---|---|---|
| Mar 1–4 | 120,000,000 |  Lee Min-young (3) | 19.5 | |||
| Mar 9–11 | 80,000,000 | Ahn Sun-ju (24) | 19.5 | |||
| Mar 16–18 | 70,000,000 |  Ai Suzuki (6) | 19.5 | |||
| Mar 23–25 | 80,000,000 | Phoebe Yao (2) | 18 | |||
| Mar 29 – Apr 1 | 100,000,000 | Ahn Sun-ju (25) | 19 | |||
| Apr 6–8 | 60,000,000 | Ai Suzuki (7) | 18.5 | |||
| Apr 13–15 | 100,000,000 | Mamiko Higa (4) | 19.5 | |||
| Apr 20–22 | 80,000,000 | Saki Nagamine (1) | 16.5 | |||
| Apr 27–29 | 80,000,000 | Hina Arakaki (1) | 17.5 | |||
| May 3–6 | World Ladies Championship Salonpas Cup | 120,000,000 | Jiyai Shin (18) | 20.5 | ||
| May 11–13 | 120,000,000 | Ai Suzuki (8) | 19.5 | |||
| May 18–20 | 70,000,000 | Bae Hee-kyung (1) | 18.5 | |||
| May 25–27 | 80,000,000 | Eri Okayama (1) | 17 | |||
| Jun 1–3 | 70,000,000 | Shiho Oyama (18) | 15.5 | |||
| Jun 7–10 | 100,000,000 | Misuzu Narita (9) | 19 | |||
| Jun 15–17 | 80,000,000 | Ai Suzuki (9) | 19 | |||
| Jun 21–24 | 180,000,000 | Misuzu Narita (10) | 19 | |||
| Jul 6–8 | 100,000,000 | Ahn Sun-ju (26) | 19 | |||
| Jul 13–15 | 60,000,000 | Chie Arimura (14) | 17 | |||
| Jul 20–22 | 80,000,000 |  Kristen Gillman (a,1) | 18 | |||
| Jul 26–29 | 120,000,000 | Hwang Ah-reum (2) | 19 | |||
| Aug 3–5 | 90,000,000 | Mami Fukuda (2) | 17 | |||
| Aug 10–12 | 80,000,000 | Hwang Ah-reum (3) | 17 | |||
| Aug 17–19 | 60,000,000 | Momoko Osato (1) | 16 | |||
| Aug 23–26 | 100,000,000 | Ahn Sun-ju (27) | 19 | |||
| Aug 31 – Sep 2 | 60,000,000 | Jiyai Shin (19) | 16 | |||
| Sep 6–9 | Japan LPGA Championship Konica Minolta Cup | 200,000,000 | Jiyai Shin (20) | 19.5 | ||
| Sep 14–16 | 80,000,000 | Kotono Kozuma (1) | 18.5 | |||
| Sep 21–23 | 70,000,000 | Kaori Ohe (3) | 17.5 | |||
| Sep 27–30 | Japan Women's Open Golf Championship | 140,000,000 | Ryu So-yeon (1) | 22 | ||
| Oct 5–7 | 100,000,000 | Shoko Sasaki (2) | 15.5 | |||
| Oct 12–14 | 80,000,000 | Misuzu Narita (11) | 19 | |||
| Oct 18–21 | 180,000,000 | Ahn Sun-ju (28) | 19.5 | |||
| Oct 26–28 | 80,000,000 | Shoko Sasaki (3) | 18 | |||
| Nov 2–4 | Shiga | US$1,500,000 | Nasa Hataoka (4) | 53 | ||
| Nov 9–11 | 100,000,000 | Hwang Ah-reum (4) | 19 | |||
| Nov 15–18 | 100,000,000 | Minami Katsu (2) | 19.5 | |||
| Nov 22–25 | Japan LPGA Tour Championship Ricoh Cup | 100,000,000 | Jiyai Shin (21) | 17 |
Events in bold are majors.
The Toto Japan Classic was co-sanctioned with the LPGA Tour.