Has an NPB (Japan) game ever ended 14-0?
Yes. NPB (Japan) has seen a final score of 14-0 24 times. It first happened on March 28, 1950, when Shochiku Robins beat Kokutetsu Swallows, and most recently on May 29, 2024, when Hiroshima Toyo Carp beat Orix Buffaloes.
That makes 14-0 the 109th most common final score out of 223 that have ever occurred in NPB (Japan). One point away, 15-0 has happened 15 times and 14-1 has happened 39 times. Nearly all of its occurrences fall between 1950 and 1979.