Cycling from Kitakyushu to Honshu

Are there any way for cycling across from Kitakyushu to Shimonoseki (Honshu)

I think there is an underground tunnel for pedestrians connecting Kyushu and Honshu.

You can walk the bicycle, but not ride it on the tunnel.

Yes, you can push your bicycle through the tunnel for a fee of 20 Yen

https://www.gururich-kitaq.com/kanmon/en/detail/index.php?id=108&app=0

Note that the tunnel closes at night.

Thank You very much for all reply.
Charoen K.
Bangkok, Thailand

It's an experience unto itself - you can see underwater in the tunnel where you cross the prefectures.
https://youtu.be/6y4K6erVyvA

Thanks' a lot Ken
Charoen K.