1) The CCHNT is the main stakeholder, owner of the Okazaki House, founded in 2002.
2) Network for Artisans' Timber Houses: Group of Master Carpenters, founded in 2001.
3) Alliance for Future Timber House: Group of architects founded in 2007.
4) Association for Preservation of Japanese Traditionala Building Techniques: Group of researchers and certified master carpenters working for preservation of cultural heritages founded in 2000.
5) Forum for Timber Building: Association for Promoting the Timber Buildings founded in 2001.
All these associations work together.