| Season | 2018 |
|---|---|
| Dates | 23 February 2018 – 1 December 2018 |
| Champions | Kawasaki Frontale (2nd title) |
| Relegated | Kashiwa Reysol V-Varen Nagasaki |
| AFC Champions League | Kawasaki Frontale Sanfrecce Hiroshima Kashima Antlers Urawa Red Diamonds |
| Matches played | 306 |
| Goals scored | 813 (2.66 per match) |
| Top goalscorer | Jô (Nagoya Grampus) (24 goals) |
| Biggest home win | Kawasaki v Consadole 7–0 (15 September) |
| Biggest away win | Vegalta v Marinos 2–8 (16 July) |
| Highest scoring | Vegalta v Marinos 2–8 (16 July) |
| Longest winning run | 9 – Gamba Osaka (Matchday 25–33) |
| Longest unbeaten run | 12 – Consadole Sapporo (Matchday 25–34) |
| Longest winless run | 15 – Nagoya Grampus (Matchday 3–17) |
| Longest losing run | 8 – Nagoya Grampus (Matchday 4–11) |
| Highest attendance | 55,689 – Urawa v Vissel (23 September, Matchday 27) |
| Lowest attendance | 6,189 – Shimizu v V-Varen (11 April, Matchday 7) |
| Total attendance | 5,833,538 |
| Average attendance | 19,064 |
← 2017 2019 → | |
The 2018 J1 League, also known as the 2018 Meiji Yasuda J1 League (2018 明治安田生命Ｊ１リーグ, 2018 Meiji Yasuda Seimei J1 Rīgu) for sponsorship reasons, was the 26th season of J1 League, the top Japanese professional league for association football clubs, since its establishment in 1992. This was fourth season of J1 League as renamed from J. League Division 1.
Kawasaki Frontale were the defending champions.