Tokyo Gov. Yoichi Masuzoe has offered to halve his salary amid growing calls that he resign following his "improper" use of public funds.

Masuzoe is expected to submit a draft to revise the ordinance on his salary by the end of the current Tokyo Metropolitan Assembly session through Wednesday.

On Monday, a probe by two lawyers appointed by Masuzoe found that his use of around ¥4.4 million in political funding between 2009 and 2014 was "improper" but not illegal.

Among the findings, the lawyers said that Masuzoe racked up six hotel stays costing ¥802,000 and 14 instances of wining and dining totalling ¥336,000, which were "inappropriately" booked as political expenditure as they likely included his family.

The former welfare minister was also under fire for frequently using official cars to visit his holiday home in a hot-spring resort town in Kanagawa Prefecture, as well as costly overseas business trips.

Representatives of each faction in the assembly continued to grill Masuzoe for a second straight day on Wednesday only to draw similar explanations from the governor.

Masuzoe expressed his intention to remain in his post.

Tokyo assembly members are also seeking to summon the governor for a separate question-and-answer session without prior notice of questions, possibly next week.