What is masako sen?

As an AI language model, I do not have access to current information and private details of individuals. However, there are a few notable people by the name Masako Sen, including a Japanese manga artist and writer who is known for creating the popular comic series "Michiko to Hatchin." Another notable Masako Sen is a Japanese politician and Member of the House of Councillors of the National Diet of Japan. It is unclear which Masako Sen you might be referring to.