Konnichiwa,
This is the Japanese/English meetup, on the second Tuesday of each month.  We are a language exchange and social group for those who have a genuine interest in Japanese language and culture.  Likewise we cater for Japanese people in London who want to speak in their native language or want to practice English and make friends.  The group has expanded considerably over time and turnout is around 200 people to our main events.  We also put on music nights and have social events such as picnics.