Kirin Holdings is a major alcohol producer, with a brand roster that includes Kirin Ichiban beer and San Miguel. The stock is up 69% this year.
The relationship between the yen and Nikkei is very close, and the index has tracked the currency closely since late 2012.
It's not clear how long the dynamic will last, but policymakers are likely to pull out all the stops to keep the ball rolling.
"The weak yen continues to be the Japanese 'wealth creation mechanism' par excellence," Steven Englander, a currency strategist at Citi, wrote earlier this month.
"The strength of the relationship means that Japanese policymakers have tremendous incentive to continue to exploit it to achieve their goals."
