Japanese Yen Weakens Despite Joint US-Japan Intervention

The Japanese yen has begun to weaken again, erasing approximately half of the gains achieved after a historic joint intervention by the Government of Japan and the United States. The currency hit a 40-year low of nearly 164 per dollar in July, prompting a coordinated yen-buying effort that initially strengthened the currency by 5% to 155. However, the yen has since slid back toward 160, underperforming all Group-of-10 peers in August.

Analysts attribute the reversal to wide interest-rate differentials with the US and concerns over Japan's government debt, which stands at roughly 230% of GDP. While the Bank of Japan has flagged rising inflation risks and hinted at interest rate hikes by September or October, internal government tensions have emerged. Prime Minister Sanae Takaichi urged the central bank to increase government bond purchases to control yields, while Growth Strategy Minister Minoru Kiuchi argued that proactive public finances and structural reforms would provide long-term support for the currency.

Japanese business executives are calling for stability to combat rising import costs for food and energy. Kenichiro Fujimoto of Mitsubishi Electric and Makoto Tanaka of Mitsui & Co warned that high volatility threatens domestic demand and Japan's recovery from deflation. A Japan External Trade Organization survey found most companies prefer an exchange rate between 120 and 124 yen to the dollar, though officials in Tokyo and Washington remain prepared to intervene again if necessary.