TOKYO: Private equity firms KKR and Bain Capital each offered more than US$5 billion in first-round bids for the non-core assets of Japan's Seven & i Holdings, according to people familiar with the matter. KKR offered around 800 billion yen (US$5.1 billion) for York Holdings, an entity due to be spun out of the Japanese retailer, two of the people said. Rival US firm Bain offered around 1.2 trillion yen, one person said. Local buyout firm Japan Industrial Partners offered around 750 billion yen,