It was a very warm day in Tokyo today. It feels like April. Everywhere I saw people wearing various types of clothes on the same day; T-shirts, down coats or leather jackets (one of them was me). There is a Japanese idiom, 三寒四温 San-kan shi-on. The literal meaning is ‘four warm days after three cold days’. The phrase represents a feature of changeable climate from winter to spring in Japan. I like this season. It's a little bit exciting to go forward to the brand new season. Even though we easily catch colds...