In February 1877, Tomochika who was the twelfth head of Sumitomo family and the twelfth Kichizaemon SUMITOMO designated Saihei HIROSE to the administrative director due to Tomochika's disease.
1877年2月、住友家第十二代家長・住友吉左衛門12代目友親は、病気のため広瀬宰平を総理代人に指名した。