By Miho Uranaka and Sam Nussey TOKYO, Feb 27 (Reuters) - Nintendo announced on Friday an unwinding of strategic shareholdings that ‌will see companies including MUFG Bank and the Bank ‌of Kyoto selling shares in the company behind gaming franchises such as "Super Mario". The ​sale, which was first reported by Reuters, will total about 290 billion yen ($1.9 billion) at Friday's closing price, excluding an overallotment. Kyoto-based Nintendo also said it would spend up to 100 billion yen buying back ‌up ...