1.
owner (who commissions a building); client
The person who orders and pays for the construction of a house or other building, as seen from the builder's side.
2.
host (who arranges and pays for a funeral or memorial service); donor to a temple
The person who arranges and pays for a funeral or memorial service, or who makes an offering to a temple or priests.
施 (give, bestow) + 主 (master). The word comes from Buddhism, where it named a person who gives alms; it was later extended to the person who pays for a building.
Similar words
- 喪主: chief mourner at a funeral — the person who represents the family. At a funeral the 喪主 and 施主 are usually the same person; if not, the 施主 is the one who pays.
- 発注者: the party placing an order — business term for any contract, not only buildings