Has an NPB (Japan) game ever ended 18-10?

Exactly once. On July 28, 1997, Fukuoka Daiei Hawks beat Kintetsu Buffaloes 18-10, and no NPB (Japan) game before or since has ended that way. When it happened it was a scorigami, the first 18-10 in league history.

Where 18-10 sits among nearby NPB (Japan) scores. Deeper blue means a score has happened more often; the outlined cell is the new one.

That makes 18-10 the 191st most common final score out of 223 that have ever occurred in NPB (Japan). One point away, 19-10 has happened 1 times and 18-11 has happened 1 times.

Every 18-10 in NPB (Japan) history

Date	Result	Season
1997-07-28	Fukuoka Daiei Hawks over Kintetsu Buffaloes	1997

Open the NPB (Japan) grid at 18-10