Big Four Japanese law firm Nagashima Ohno & Tsunematsu has advised Tokyo-listed Japanese marine construction company Toyo Construction on its opposition to an $833 million unsolicited buyout offer from Nintendo’s founder-linked investment firm Yamauchi-No.10 Family Office (YFO).

Toyo’s board of directors has unanimously opposed a tender offer by YFO for the company’s ordinary shares, and subsequent squeeze-out procedures to make the marine construction firm a wholly-owned subsidiary, according to a December 14 press release.