Introduction

Tatsuo Ushijima is a distinguished researcher focusing on the impact of corporate diversification and organizational structure on firm value. His work explores diversification effects, corporate restructuring, and the role of R&D in innovation.

■Resource Allocation in Diversified firms
・Research Objective: To analyze the influence of corporate lifecycle on the internal capital markets of diversified firms.
- Title: Firm Aging and Internal Capital Markets, Tatsuo Ushijima (Pacific-Basin Finance Journal） 92 102760 Sep. 2025.
■Diversification effects
・Research Objective: To investigate the more-money and less-cash effects of diversification on the industry-adjusted debt and cash holdings of Japanese firms.
- Title: More-money and less-cash effects of diversification: Evidence from Japanese firms, Ushijima Tatsuo （Japan and the World Economy） 56 101040 Dec. 2020
・Research Objective: To examine the impact of organizational structure on the diversification discount in Japanese firms.
- Title: Diversification, Organization, and Value of the Firm, Ushijima Tatsuo （Financial Management） 45 （ 2 ） 467-499 May. 2016

Areas of Research

・Corporate Restructuring
・Mergers and Acquisitions
・Diversification
・Finance
・Business Administration

Social Contributions

・Improving Corporate Resource Allocation
・Understanding Dynamics in Diversified Firms