TOKYO -- Japanese manufacturers Denso and Komatsu will ensure that their domestic supply chains remain intact by helping small-to-midsize component makers groom a next generation of leaders. Denso, a big maker of autoparts, will provide such succession support to about 100 suppliers. Candidates in their 30s and 40s will be selected to take part in a one-year program where they will learn business management, human resources development and other skills.