I'm not so sure. Automobiles are the leading export for both Japan and Germany, but Japan's auto fraction is significantly larger:

> https://tradingeconomics.com/germany/exports-by-category

> https://tradingeconomics.com/japan/exports-by-category

What's more, Germany mostly "exports" to neighboring EU countries, which is a low friction and more stable proposition. Japan's exports are mostly to the US, China, and South Korea; its top export destination is China (+ Hong Kong).

> https://tradingeconomics.com/japan/exports-by-country

Bottom line is that any scandal that hurts Japan's auto industry really hurts Japan's entire economy.