Oyasato Seminar or OS (in Japanese, おやさと練成会 oyasato renseikai) is a program that began in 1984, which is "geared toward transmitting the faith to mainly high-school-age participants who are to shoulder the tasks of the overseas mission" at the Jiba (Tenri-shi, Japan). The Oyasato Seminar English Course has three courses: Course 1 in Jiba, Course 2 at your nearest mission headquarters, and Course 3 in Jiba once again.
Originally, this program was launched "to nurture successors of the faith living outside Japan."
This program is held in 5 different languages English, Spanish, Portuguese, Chinese, and Korean. However, the courses not in English, do not have three courses like the English Course does. Nor are some of the languages held every single year.
- Traversing the Jusan Pass and then walk down to the Main Sanctuary.
- Door-to-door missionary work
- Handing out pamphlets at high pedestrian traffic areas
- Spreading the name of God (kami-nanagashi) by singing (and sometimes performing) Yorozuyo while holding a flag with the name of God, Tenri-O-no-Mikoto.
- Listening to the Besseki Lectures and receiving the Grant of Sazuke.
- Keidai-gakari, or Main Sanctuary duty as a Hinokishin activity