Koboku-kai is a Suibokuga(India ink painting) group, and in 2015 it has been 40 years since Koboku-kai was established. 

You can learn Suibokuga with your modern sense from a beginner to a man of experience.

Whoever has an interest in Suibokuga or Sumie and wants to draw it, Mr. Aida Niki, the president of our group, will teach you Suibokuga very kindly and politely as your experience of it.

Every student has learned Suibokuga with each other in a pleasant and friendly atmosphere. We also go sketching and hold an annual exhibition every year.



The representative of Koboku-kai

相田 二樹 Aida Niki


Aida Niki was born in Yokohama in 1949. After graduating from university, he studied Suibokuga under his father, the late Aida Kohei. He also learned sketch at Kofu-kai art institute.

Since 1976, he has joined the Modern Suibokuga Association (Gendai-Suibokuga-Kyokai) and entered his artworks.

1980  He received Governer’s Award of Tokyo for

          White herons’s scene (Shirasagi-no-Fu).

1984  He received Foreign Minister’s Award for

          Dawn at Inbanuma Swamp  (Inbanuma-


1986  Prime Minister’s Award for Condors at Night


He also entered his artworks Japan-France art exhibition and received Academy Beaux Arts Award, fine work award and so on.

1994  As a part of Yokohama-city’s cultural exchange, he went to Mumbai,

          India in order to hold Suibokuga lessons.

1995  He became one of the funding members of Chaos-kai group, which is 

          modern Suibokuga group. Chaos-kai group has held an exhibition every

          two years.

He taught at Asahi culture center, Tobu culture center and so on.

2015 Sept.  He held a solo exhibition at Yokohama Red Brick Warehouse.

Now, he is the president of Koboku-kai group, a member of the Modern Suibokuga Association (Gendai-Suibokuga-Kyokai). 


To see his artworks…



The history...




1986 Sept.




1998 Jan.



1999 June


2001 Apr.


2004 Dec.  2005 May


2008 Mar.


2014 Apr.

2014 Nov.


2015 June

The late Aida Kohei established Koboku-kai group.

   The spirit of Koboku-kai was to draw Suibokuga with modern

   sense and develop it more.

14th Koboku-kai’s exhibition was held. 

   The first collection of paintings was issued.

   Until 22nd exhibition, collections of paintings were issued

   every year.

25th Koboku-kai’s exhibition was held. 

   The exhibition of the posthumous works by the late Aida

   Kohei was also held. A Collection of paintings was issued.

27th Koboku-kai’s exhibition was held. 

   A collection of paintings was issued.

30th Koboku-kai’s exhibition was held. 

   A collection of paintings was issued.

35th Koboku-kai’s exhibition was held. 

36th Koboku-kai’s exhibition was held. 

   A collection of paintings was issued.

40th Koboku-kai’s exhibition was held. 

   A collection of paintings was issued.

Koboku-kai’s home page was opened. 

45th Koboku-kai’s exhibition was held. 

   A collection of paintings was issued.

46th Koboku-kai’s exhibition was held.  

   40 years have passed since Koboku-kai was established.



The founder of Koboku-kai

相田 黄平 Aida Kohei


Aida Kohei was born in Hokkaido in 1909. At first, he learned oil pantings and presented his artworks at the Independent Art Association (Dokuritsu Bijutsu Kyokai) and joined Kokuga-kai group. As soon as he got to know about Suibokuga artworks in China , he was fascinated with spirituality and depth of Suibokuga and he came to draw it. 

After the World War , he studied Suibokuga by his own efforts and started Bokusai-kai group, which is later Kouboku-kai group. He became to be known as a teacher of Suibokuga inside and outside of Japan. 

1973  He held solo exhibitions in San Francisco, Seattle, Aspen and so on.

1975  He established Koboku-kai group and had taught many people 


He passed away in 1995.  


He wrote…

Skills of Sumie ~8 series” (in Japanese, Nichi-Bo publishing firm),

Skills of Bokusai and Suiboku” (in Japanese, 1988, Nichi-Bo publishing firm), “Sumi-e Self-taught”(in English),

Japanese Brush Painting in Color”(in English)


To see his artworks… 



Let's try Suibokuga!

If you want to try Suibokuga, you can join a semi-private lesson!

You don't have to prepare anything before you join the lesson; all you have to do is just come!

Please contact us below or reserve from here!

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