If you are at shinjuku station it's worth a walk up Mosaic Street. It's nestled between Odakyu and Krio stores up a slope. There's a Cath Kidston store but found it more expensive than the UK stores. Loved Baned which is a small shop selling different fabric purses/bags which you can have personalised by purchasing various badges/motifs which they then glue heat onto the bags.
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