Shopping is a national sport in Japan, but for an amateurish gaijin it can be a challenge. After four days in the country I had bought what I could from the famous 99 yen shops Japanese crockery, Japanese pens, Japanese snacks, even Japanese-print boxer shorts &mdash all of it made in China. By the time I was back at Narita airport my pockets were still jingling with unspent yen but I was several presents short of a happy office. I picked up several exquisitely wrapped boxes with mysterious contents and then, just as I was down to my last 350Y, I spotted this a jigsaw postcard of the famous Hokusai woodcut &lsquoThe Great Wave off Kanagawa&rsquo.