He started his career in 1907 as a bicycle racer; his company, Tomeye Trading Co., was the Velocette motorcycle importer in Tokyo.
Races, sponsored by the national newspapers and intended to boost enthusiasm for Japan's rapidly developing industry, attracted crowds of up to 50,000.
Tada was invited to race at the 1930 Isle of Man TT by Veloce Ltd, to celebrate the global popularity of their new KTT production racer.
[2] Tada was loaned Alec Bennett's semi-works 350cc Velocette KTT bike,[3] finishing 15th while gaining the nickname "the India Rubber Man", as he had a number of minor falls during the course of the race but remounted to carry on.
At the prize giving ceremony after the race, Tada wore traditional haori (half length kimono jacket), hakama (loose trousers), tabi (toe socks), and geta (wooden sandals).