Mr.Takeuchi joined Mori Building Co., Ltd. in April 1979 after graduating with a B.A. Economics degree from Aoyama Gakuin University. As one of the pillars of Mori's sales division, he gained extensive experience in the leasing of offices and high-class residential condo-miniums. By successfully recruiting firms such as Bank of America and Goldman Sachs as tenants, he spearheaded Mori's undertaking to establish the Ark Hills complex as a major financial center. Ark Hills, completed in 1986, was Japan's first private multi-use urban redevelopment complex, by far the largest project at the time with a land area of 5.6 hectares and total floor area of 360,600 square meters, at a project cost of 90 billion yen. Ark Hills captured industry attention by fully leasing out its 103,591-square meter office tower before building completion despite an ongoing recession, thus gaining Mr.Takeuchi mention as a legendary salesman in the autobiography of the late Taikichiro Mori, Mori Building's founder.

He has also been actively involved in the market research & product development of office buildings & residential condominiums, creating the foundation for the Mori Building brand. In particular, his analytical skills in market research have been highly regarded by government, banking, and local & foreign securities analysts. He contributed to the basic planning & product development of Roppongi Hills, Mori's 270-billion-yen flagship project completed in 2003.

He took a pioneering role in Mori's expansion into China by handling the market research for all three of the company's office building projects there, including the 101-storey high-rise tower in Pudong, Shanghai. More recently, he has also been handling asset management for a foreign-financed real estate fund.

Besides the real estate and construction industries, he also maintains extensive contacts with foreign financial institutions. He is married with two children, and is the proud parent of Grace, a Golden Retriever.