General Catalog
Rubber baseball,Leather baseball,Softball,Teeball and Softtennis
Baseball5 Broucher
3color of Baseball5 balls
History of Rubber Baseball
How rubber baseball was introduced and developed in Japan
History of official ball for rubber baseball
From its beginning,the design has changed 6 times
Introduction of Nagase Kenko Corporation
Brief introduction df Nagase Kenko and it's products
Official ball in Japan
Official Kenko ball and court mat
Baseball Federations in Japan
Courtesy of Baseball Federation of Japan
Comparison between leather ball and rubber ball
Safety,bounce height,water resistance and durability
