We have made 3 tables in this page. 
					        First table will list the international schools in Japan that offer complete K12 education in English language. 
					        Second table will list international schools in Japan offering primary or middle school and not complete K12 education. 
				          Third table will list all international schools offering education in other languages like German, French, Chinese etc...						  
International Schools offering K12 Education
The below lists all the international schools in Japan that provide education from KG to Grade 12. As you can note, Saint Maur International school in Yokokama is the oldest international school in Japan. The table is sorted by the year of founding. Get this list sorted by City name.
International Schools offering primary/middle school and NOT complete K12 Education
The below lists all other international schools in Japan that provide education in English medium.
| School Name | Grades | City | Year of Founding | 
|---|---|---|---|
| St. Michael's International School Kobe Japan | KG to G6 | Kobe | 1946 | 
International Schools offering education in NON-English medium
Deutsche Schule Tokyo Yokohama (German School)
                            2-4-1, Chigasaki-Minami, Tsuzuki-ku, Yokohama-City, Kanagawa-Pref.
                          http://www.dsty.ac.jp
Yokohama Overseas Chinese School (Taiwan based Chinese School)
                            142, Yamashita-cho, Naka-ku, Yokohama-City, Kanagawa-Pref.
                            http://www.yocs.jp/ 
International Schools in other parts of Japan to be sorted out and placed in the above tables:
                          
Tohoku International School
                            Pre-KG to Grade 12 
7-101-1 Izumi-ku Yakata Sendai Miyagi pref.
                            https://www.tisweb.net/
Columbia International School
                            KG to Grade 12 
153 Matsugo Tokorozawa Saitama,Japan 359-0027
                            Phone: +81-4-2946-1911
                          Fax: +81-4-2946-1955
                          www.columbia-ca.co.jp 
                          E-mail: admissions@columbia-ca.co.jp                          
Kansai christian school in Nara
                          Grade 1 to 12 
                          http://www.kansaichristianschool.com/
                          Founded 1970                          
Kyoto 
                            http://kiua.kyotoiu.ac.jp/en/01about/index.html
                            1 to 12						  
WICS 
                            4 Chome-41-1 Takadanobaba
                            Shinjuku-ku, Tōkyō-to 169-0075
                            Japan
                            Tel : 03-5989-1779 |
                          American education standards
https://www.google.co.in/maps/place/4+Chome-41-1+Takadanobaba,+Shinjuku-ku,+T%C5%8Dky%C5%8D-to+169-0075,+Japan/@35.7094491,139.6927276,17z/data=!3m1!4b1!4m5!3m4!1s0x60188d34477aff7d:0x32ffb27dbae3d45d!8m2!3d35.7094491!4d139.6949163
https://www.google.co.in/maps/dir//4+Chome-41-1+Takadanobaba,+Shinjuku-ku,+T%C5%8Dky%C5%8D-to+169-0075,+Japan/@35.7094491,139.6927276,17z/data=!4m16!1m7!3m6!1s0x60188d34477aff7d:0x32ffb27dbae3d45d!2s4+Chome-41-1+Takadanobaba,+Shinjuku-ku,+T%C5%8Dky%C5%8D-to+169-0075,+Japan!3b1!8m2!3d35.7094491!4d139.6949163!4m7!1m0!1m5!1m1!1s0x60188d34477aff7d:0x32ffb27dbae3d45d!2m2!1d139.6949163!2d35.7094491
International School of the Sacred Heart (ISSH)