Ikkou, real name Kazuhiro Watanabe（渡辺一弘）is a very popular and well regarded potter. 
His father is the master potter 'Shouzan' (Akira/Masami Watanabe), and his mother 'Fusyu'. He celebrated his 60th birthday this November of 2016! (born in 1956)
Apparently ... his sign; 一弘 can also read as Ikkou, so he became known as Ikkou, which led him to change his potter name to Ikkou (壱興). Therefore his older work may be signed  一弘造印, (Kazuhiro made), and newer works are usually signed 壱興造記, (Ikkou made.)

Very popular and well made pots, mostly glazed shohin containers, but also unglazed and chuhin sized pots. His glazes are superb, and he does an oribe glaze to rival those of Koyo, or Ino.

Text courtesy of topshelfbonsaipots.co.uk. Please pay them a visit and be amazed by their incredible library and collection!