Japanese Challenge: The correct name for this bridge

Can you read this correctly? Please put your answer in Hiragana or Romaji. Thanks!

子子子子橋

Never seen that word before.

ko-ko-ko-ko hashi?
ko-ko-ko-ko bashi?
ko-ko-ko shikyou?
shi-shi-shi-shi kyou?

four-child bridge?
tiny bridge? childish bridge? children's brige?

No, I can't read that.

My first guess was that 子子 might really be 孖, but that still didn't help me. I can't read it either.

What city is that bridge in?

Lol, like boufuri boufuri bashi?

Hint: The bridge is or was on the island of Kyushu.

Second Hint: It is the character for child repeated four times and bridge, of course.

Third Hint: Each character gets a different reading/pronunciation.

Ah, I have no idea, too many possibilities.
What about Koneshitsu?

Well, that character has about 10 nanori. Which nanori compose it, I don't know.

Also, a search on Google Japan turns up nothing.

The character for "child" has four readings. Don't feel bad if you didn't get it, Japanese natives have trouble with this.

According to Nelson:

Su/ko=child
shi=viscount, male
ne=11 p.m. to 1 a.m., also the rat/lst zodiac sign

Su-ne-ko-shi bridge.

There are also other possible meanings for the readings.

Maybe you can surprise your Japanese friends!