Reservation sales are growing. Active in all areas of Japan, Oak's main product lines include men's clothing, jewelry, casual wear and underwear. Tostem Viva is one of Japan's largest operators of home improvement stores. The company is a member of the Tostem Group. Aoki is Japan's second largest retailer of men's apparel.
Most stores are in the Tokyo area, primarily large-scale stores along major suburban highways.
The company is developing its own brands and has an integrated system for production from fabric through sales. Aoki is increasing its men's apparel chain and opening a new chain that sells children's clothing. The company is also studying new retailing formats. Volks operates a chain of family restaurants with emphasis on steak. The company ranks number one in the steak house restaurant category in Japan.