What signal does Katayama Satsuki's retention send? Sanae Takaichi defends the key link of US-Japan exchange rate cooperation.

According to reports from local media, Katayama Kazuki, Japan's Minister of Finance, will remain in her position during the upcoming cabinet reshuffle. This decision will support her management of economic, monetary, and budgetary process restructuring. Reports indicate that Katayama will continue in her post during the cabinet reshuffle expected later this month.

Katayama is a key figure in Prime Minister Sanae Takaichi’s cabinet, equivalent to US Treasury Secretary Scott Bescent. In recent years, Bescent has become increasingly vocal regarding Japanese policies and has pressured Japan to raise interest rates, while Katayama often turns to Bescent for support in stabilizing the yen’s exchange rate.

This reappointment reflects Takaichi’s trust in Katayama’s policy handling and aims to ensure that the cabinet reshuffle does not trigger market fluctuations. Replacing Katayama could disrupt the close US-Japan cooperation on exchange rate issues and increase market concerns about Tokyo’s spending plans. This could once again drive up bond yields and cause the yen to depreciate.

According to reports, Takaichi plans to reshuffle her cabinet to consolidate power within the ruling Liberal Democratic Party. Key positions—including Kihara Minoru as Chief Cabinet Secretary, Taro Aso as LDP Vice President, and Shunichi Suzuki as LDP Secretary-General—may remain unchanged.

This reshuffle comes between Takaichi’s appointment as prime minister last October and her scheduled departure as LDP leader next September. In Japan, cabinet reshuffles—whether due to a new leader or not—are commonplace, taking place nearly every year in recent times. Sometimes, leaders adjust their cabinet lineup to boost declining approval ratings or to respond to political crises.

This personnel change provides Takaichi an opportunity to appease some allies eager to strengthen their roles. This includes senior members of the Japan Innovation Party, her coalition partner, who have expressed a desire to play a bigger role in government affairs.

Adjusting the personnel structure also helps to contain potential rivals before next year’s LDP presidential election. Attention is focused on how Takaichi will accommodate potential challengers within the LDP, such as Minister for Internal Affairs Yoshimasa Hayashi.

Katayama’s crucial role in US-Japan joint interventions

Since taking office last October, Katayama has played a central role in controlling the yen’s depreciation and reassuring investors, with Takaichi’s ambitious spending plans repeatedly sparking concerns over Japan’s public finances.

At the end of July, she brokered the first coordinated US-Japan currency intervention since 1998 to support the yen’s exchange rate. Given Washington’s historic reluctance to intervene in foreign exchange markets, this was a remarkable achievement. The joint action sent a powerful signal that both countries were prepared to cooperate closely.

Since taking office, Katayama has met Bescent on multiple occasions, sometimes addressing him by his first name, indicating a close relationship. On Friday, Katayama, speaking about her meeting with Bescent earlier this week at the G20 finance ministers’ meeting in North Carolina, said that Bescent highly praised Ryosuke Takaichi’s economic policies and did not question her on the country’s fiscal plans.

A former Ministry of Finance official with deep market expertise, Katayama pays particular attention to calming investor concerns. Earlier on Friday, she released the budget request statistics for next year’s budget. Previously, the budget formulation process underwent major reforms, which she described as the largest since the end of World War II.