At age nineteen, Toshi accompanied has father on a sketching trip to India and later to Southeast Asia. He had inherited not only his father's talent but also his passion for traveling. After the end of World War II, he traveled all over the world, including Antarctica. Throughout the United States and Europe, Toshi made sketches for new prints, exhibited his art and lectured about woodblock printmaking. 

Following his father's death in 1950, Toshi began experimenting with abstract art, but within just a few years, returned to his realistic style of depicting landscapes and animals.