The biography and context provided do not specify any particular productivity apps used by Haruki Murakami. However, many writers and novelists often rely on tools such as word processors and note-taking applications to organize their thoughts and work efficiently. If Haruki Murakami has mentioned specific apps in interviews or discussions, that information isn't included here.

Haruki Murakami collaborated with Uniqlo to create the 'Haruki Murakami / Murakami RADIO UT' collection, launched on March 8th, 2021. The collection includes graphic T-shirts inspired by six of his most famous works, including 'Norwegian Wood' and '1Q84', as well as designs inspired by his radio show 'Murakami RADIO'.

Haruki Murakami's name is associated with Cinnamon Company Limited through a trademark application filed on November 18, 2020. This application covers various clothing items and was officially registered on October 12, 2021, indicating a formal relationship for producing apparel under his name.