Tornadoes frequently occur in Japan. Although the Japan Meteorological Agency (JMA) maintains the tornado database that documents these events and their environmental conditions, it lacks information regarding the morphology of the parent convective systems. Since tornado intensity and damage risk vary depending on the parent system type, establishing a climatology based on these system types is crucial. Furthermore, understanding the environmental differences that yield these systems can improve tornado warning systems. The present work aims to classify these convective systems and investigate their climatological characteristics and the relationship with synoptic environments. The tornado events were selected from the JMA tornado database, specifically those located within the observation range of JMA and XRAIN radars. The analysis period covers 16 years from 2010 to 2025. We analyzed the reflectivity and Doppler velocity fields for events and classified the convective systems based on the shape of the strong echo region >40 dBZ in reflectivity, the size and tangential velocity of vortices in Doppler velocity distributions, and moving velocity of the systems. As a result, 182 convective systems were classified 9 types: Supercells, T-QLCS, L-QLCS, S-QLCS, Bow, Isolated cumulonimbus, Cloud clusters, Rake, and Inner rainband of typhoon. The following trends were observed: Supercell and Cloud clusters predominantly occur on the Pacific side and inland areas from summer to autumn. Conversely, QLCSs (T-, L-, S-, Bow) occur the Sea of Japan side and inland from autumn to winter. Isolated cumulonimbus events are frequent in coastal area from summer to autumn. Regarding the synoptic environments, Supercells are primarily associated with typhoons, whereas QLCSs are associated with cold fronts. The environments for Isolated cumulonimbus and Cloud clusters require further detailed investigation.