This is a male showing the black ear-coverts which characterize the Japanese race E. c. ciopsis. Notice also the richly colored flanks. Its bill is longer and more slender than mainland races and its vocalizations are said to differ making this population a candidate for a possible future split. Canon PowerShot SX60.
References:
Byers, C., J. Curson, and U. Olsson. (1995) Sparrows and Buntings: A Guide to the Sparrows and Buntings of North America and the World. Houghton Mifflin, Boston.
Madge, S. (2019). Meadow Bunting (Emberiza cioides). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from https://www.hbw.com/node/61866 on 9 April 2019).