The Indonesian Rupiah experienced a depreciation following the unexpected resignation of Bank Indonesia Governor Perry Warjiyo on Monday, according to FX Street. This move triggered a shift in market sentiment, impacting the currency's value against the US dollar.

During the early European hours on Tuesday, the USD/IDR exchange rate traded around 18,130, reflecting the Rupiah's weakening position. The resignation of a central bank governor often raises questions about monetary policy direction, prompting cautious reactions in the FX market.

For Japanese investors and traders, developments in Southeast Asian currencies like the Rupiah are important to monitor, given Japan's trade and investment ties with the region and the potential impact on regional equities and FX volatility.