Mitsui Fudosan Residential has issued a rule banning pre-delivery resale of units at Central Garden Tsukishima The Tower, threatening contract cancellation and deposit forfeiture of up to about 20 million yen for violations. The move targets investors who do not intend to live in the property but participate in lotteries to resell at higher prices amid surging prices. While rare for a major developer to take such a hard line, critics say loopholes remain and question whether it will actually curb speculation, noting past cases like Harumi Flag where many flats went to corporate buyers.