The Aichi International Plaza Japanese Class organized by the Aichi International Association in the Sannomaru Annex Building of the Aichi Prefectural Government in Nagoya, Aichi Prefecture, is celebrating its 20th anniversary.

The teachers are volunteers who do not get paid. The program gained popularity for offering small and inexpensive classes, providing the opportunity for cultural exchanges at a grass-roots level in the governmental office quarter.

"This is called a ryō-shū-sho (receipt). Repeat after me," a teacher said to a male Korean student one Friday afternoon. She had just received payment from the student and was holding a receipt.