Japan Market Desk: Nikkei Reclaims 70,000 as AI Strength Meets 3% JGBs

Nikkei and TOPIX are confirmed Oct. 6 final closes. The 10-year JGB is the Oct. 6 market-close yield; U.S. equity indexes are Oct. 6 final closes. USD/JPY 158.28 is the public quote checked at 08:58 JST on Oct. 7.

Tokyo opened only slightly higher after Monday’s surge, then accelerated in the afternoon. The Nikkei 225 finished at 70,683.98, up 737.12 points or 1.05%, while TOPIX rose 0.92% to 4,183.56. Market breadth was healthier than the headline alone suggests, with advancing shares comfortably outnumbering decliners.

AI and semiconductor names remained central, but the gains were not confined to them. Public closing data showed real estate, banking and textiles among the stronger groups, while lower oil helped the broader risk tone. A weak yen supported exporters’ translated earnings, but Tuesday was not simply a currency trade: higher domestic yields also supported financials, and buying broadened beyond the highest-weight chip names.

USD/JPY moved back above 158 during the Tokyo afternoon. It was around 158.10–158.20 at 17:00 JST, and Japan.co.jp’s 08:58 JST check on Oct. 7 showed 158.28. The yen therefore remained weak well after the cash-equity close.

That level still helps the translated earnings of exporters in autos, machinery and electronics. It also raises the yen cost of imported energy, food and raw materials for households and smaller businesses. A move closer to 160 would quickly bring Ministry of Finance intervention warnings back into focus.

The 10-year JGB yield ended Oct. 6 around 3.087%. The Ministry of Finance’s new 10-year auction carried a 3.1% coupon; the weighted-average accepted yield was 3.101% and the yield at the lowest accepted price was 3.103%. Three-percent government borrowing is no longer a passing market curiosity.

Higher yields can help banks and insurers through better lending and investment spreads, while creating a tougher discount-rate environment for real estate and richly valued growth shares. Tuesday’s market therefore combined two powerful stories: AI-led earnings optimism and a materially higher domestic cost of capital.

After Tokyo closed, Europe strengthened. The STOXX 600 gained 0.5% as lower sovereign yields and softer oil improved risk appetite. Wall Street then extended the handoff: the S&P 500 gained 0.6% to a record 7,818.93, the Nasdaq rose 0.45% to a record 27,599.79 and the Dow added 0.5%.

For Tokyo, that is a constructive overnight backdrop. AI risk appetite remained intact in the U.S., while oil and Treasury yields eased from recent extremes. But the Nikkei has already reclaimed 70,000, so the next session will test whether investors chase the global rally or use fresh strength to take profits.

Bank of Japan Governor Kazuo Ueda told the national securities industry meeting on Oct. 6 that underlying inflation is approaching 2%, while reiterating that the BOJ will continue raising the policy rate and adjust the degree of monetary accommodation in line with the economy and prices.

That makes the coexistence of rising equities and rising yields the central policy-market question. Strong earnings can absorb a higher discount rate; persistently higher long yields eventually reach real estate, business investment, mortgages and the government’s own interest bill.