Nikkei 225 closes down 0.02% at 69,030.92; Topix gains 0.3%

The split between Japan's two headline benchmarks is the detail worth noting: a flat blue-chip index alongside a firmer broad market implies the move was driven by index composition rather than a uniform shift in sentiment. That divergence says more about which names carry the Nikkei's weighting than about any macro catalyst, since none is cited here. Whether the Topix's relative strength persists, or the two benchmarks re-converge, is the open question.