Did Japan have a naval reformer like Fisher?

Did Japan have anyone as capable a naval reformer as John Fisher?

Yes: Mitsumasa Yonai is presented as at least Fisher's equal as a reformer, though Japan gave him less freedom to shape events.

Mitsumasa Yonai is presented as a reformer at least comparable to John Fisher. Yonai drove carrier, cruiser, destroyer, and institutional modernization while judging the fleet through its industrial and logistical support. He opposed concentrating scarce yards and money in the Yamato class because infrastructure offered greater strategic resilience. Japan gave him less freedom to shape events than Britain gave Fisher, and his opposition to an unwinnable war kept him from earning an operational reputation in battle.