Haikus/Haiku - Which is the plural ?

Whilst clearing my desk, prior to leaving, I found these haiku in a drawer.

The Church Steeple
The Church Steeple stands
Pointing towards Gods heaven
Bells call on Sunday

The Minister Leaves
Red topped and portly
Moving onto other things
It is "Good-Bye" time.

The Christmas Tree Festival
Aldwinckle twinkles bright
Joyful way to celebrate
St Giles follows on

An Alpha Course
Questions, questioning
Teaching the Christian Belief
It's the Alpha way

The Church Council
It's the Church Council
Talking. Why do we do it?
Who else will pay the bills ? :-)

I found out that the plural of Haiku is Haiku. Don't you love those Japanese :-)