Hedge fund Oasis Management is raising pressure on a Taiwanese chip company to scrap its New York listing, the latest sign of activist pressure in Asia.

The Hong Kong-based fund has asked the Taiwan arm of ChipMOS Technologies Inc. to buy back ChipMOS’s Nasdaq-listed shares, according to a letter sent Monday and reviewed by The Wall Street Journal. Oasis will benefit from the company doing so, reporting in late June that it had…