That chart is KNAMF: Konami’s thinly traded U.S. OTC stock, in USD, covering the whole company (not KDE) during a massive yen decline. Konami’s Tokyo shares rose from ¥1,540 when Kojima became KDE EVP to ¥2,940 when he left. Your dates are wrong, too.
And you call me a liar?
Who knew 'Metal Gear historians' (lul) lie just as much as *regular* historians?