Sapporo Holdings Ltd. said Thursday it has asked Warren Lichtenstein's Steel Partners Japan fund to provide additional details on the purpose of a business plan the U.S. takeover fund submitted earlier this month.

Sapporo doesn't have enough information to decide how to respond to the fund's proposals and wants more information within 10 business days, the company. Japan's third-biggest brewer received the 170-page business plan from Steel Partners Japan Strategic Fund (Offshore) L.P., its largest shareholder.