Has an NPB (Japan) game ever ended 22-0?

Exactly once. On September 1, 1992, Seibu Lions beat Kintetsu Buffaloes 22-0, and no NPB (Japan) game before or since has ended that way. When it happened it was a scorigami, the first 22-0 in league history.

Where 22-0 sits among nearby NPB (Japan) scores. Deeper blue means a score has happened more often; the outlined cell is the new one.

That makes 22-0 the 191st most common final score out of 223 that have ever occurred in NPB (Japan). One point away, 23-0 has happened never and 22-1 has happened never.

Every 22-0 in NPB (Japan) history

Date	Result	Season
1992-09-01	Seibu Lions over Kintetsu Buffaloes	1992

Open the NPB (Japan) grid at 22-0