This is April Fool’s Day, the Japanese way! Indeed, “a new Spring Drive Grand Seiko has been designed especially for Ninja! The case is inspired by ‘Shuriken’, the most commonly used concealed weapon of Ninja. Spring Drive is the perfect movement for Ninja missions that require precision, silence and a smooth plan of action.” Congratulations for the humour and too bad it is only a joke - but it is true that it might also hurt the wrist of its owner...