also: はっこうしょ
noun
publishing house; publisher's office
Refers to the physical office or the organization that publishes books, magazines, etc. Often used in formal contexts or in colophons.
この本の発行所は東京にある。
The publisher of this book is located in Tokyo.
奥付には発行所の住所が記載されている。
The colophon lists the address of the publishing office.
出版社 is the more common and general term for a publishing company, while 発行所 emphasizes the office or the entity responsible for issuing a publication.
Compound of 発行 (はっこう, 'publishing') and 所 (しょ/じょ, 'place'). The reading じょ is a common rendaku form of しょ when used as a suffix.