1. If/when the Northern and Southern Courts…; If the Northern and Southern Courts existed…
1. If/when the Northern and Southern Courts…; If the Northern and Southern Courts existed…
1. Northern and Southern Courts (of Japan; 1336-1392); Northern and Southern Dynasties
2. Northern and Southern Dynasties (of China; 420-589)
1. Nanbokuchō period (of Japan; 1336-1392); period of the Northern and Southern courts
2. period of the Northern and Southern dynasties (of China; 5th-6th centuries CE)
1. Wei, Jin, and Southern and Northern Dynasties period (China, 220-589 CE)
1. Was not the Northern and Southern Dynasties period.; Was not during the Northern and Southern Dynasties.
1. During the Northern and Southern Courts period.
1. Not the Northern and Southern Dynasties.; Not during the Northern and Southern Dynasties.
1. Wasn't the Northern and Southern Dynasties period.; Wasn't the period of Northern and Southern Dynasties.
1. Is not the Northern and Southern Dynasties period.; Is not from the Northern and Southern Dynasties.
1. It is not the Nanboku-chō period.; It isn't the Nanboku-chō period.