In 1997 NYK's tanker, the Diamond Grace, ran aground and ruptured three of its tanks. The accident spilled 10,000 bbl of crude oil into Tokyo Bay. Determined to remain Japan's largest marine transporter, NYK forged ahead despite the harsh operating conditions. In 1998, NYK merged with Showa Line Ltd., leaving Japan with four major shipping companies—NYK, Mitsui OSK Lines, Kawasaki Kisen Kaisha, and Navix. As a result of the merger, NYK operated 535 ships. The company established a handful of new subsidiaries over the next several years including e-JAN Co. Ltd., NYK Logistics China, NYK Logistics Europe, and Singapore-based NYK Ship Management Co. Ltd.