Recent seismic activity in Japan, including a 7.7-magnitude quake in April 2026 and follow-up advisories, has elevated vigilance around the Nankai Trough and other high-risk zones, keeping the "Yes" outcome near even odds. Ongoing studies highlight rising long-term probabilities in areas like Hokkaido, yet seismologists stress that precise short-term forecasts remain unreliable due to the limits of current detection methods. Traders appear to balance this background risk against the low base rate for a true megaquake within the narrow window to August 31. A follow-up event exceeding magnitude 7.5 or an escalated government alert could quickly shift sentiment toward "Yes," while an extended quiet period or expert commentary emphasizing the absence of immediate precursors would likely favor "No."