Keep an eye out at Karato Fish Market — you're likely to come across some treasure or funny trinket in one of its many stalls. After you've had a thorough browse of things, enjoy a meal from one of the local food vendors.
If you're planning to stick around a while in Shimonoseki, Karato Fish Market is a fine place to kick off your sightseeing. This community marketplace is one of many attractions worth seeing here. Mojiko Retro, Shimonoseki Marine Science Museum, and Sea Mall Shimonoseki are also waiting to be discovered nearby.