Ambiguous tag.
- For some potential artists named ookura: ookura_* | *_ookura
- For some characters named ookura: ookura_* | *_ookura
- For some copyrights named ookura: ookura_* | *_ookura
- If you want the tag for the Japanese Ministry once called Ookura-shou (current name: Zaimu-shou), use Ministry Of Finance Of Japan.