The halls of learning.
Today Mito HollyHock visit Oita Trinita. Trinita is Italian for Trinity. The Three-in-One they're talking about, though, are the citizens, companies, and local government of Ōita. Man alive. Ōita is a city of about half a million on the southern island of Kyushu, and has a sporadic history of Christianity. The local daimyo Ōtomo Sōrin was a convert back in the Sengoku days. Between 1% and 2% of Japanese people today identify as Christian, so the name Oita Trinita would seem to be more a matter of local colour than religious conviction.
After the Meiji Restoration the Japanese educational system was reorganized along Western lines, and the country experienced an influx of missionary educators. Before that, though, the job of higher education fell to the Buddhist monasteries, and to the han schools run by noble families. One such was the Kōdōkan belonging to the Tokugawa clan in Mito.
Picture source. Look here too. [Oita 1 - 0 Mito.]
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