Complex sentence: Nagako competed 10 years in competitive snowboarding around the world and now enjoys casual snowboarding in Japan, currently Studying to obtain an accounting license in Japan and also helping with snowboarding tours from Tokyo in the winter.
Split into simpler sentences: Nagako competed 10 years in competitive snowboarding around the world and now enjoys casual snowboarding in Japan. She is studying to obtain an accounting license in Japan and also helping with snowboarding tours from Tokyo in the winter.