According to the 2010 U.S. Census, the Japanese American population has the highest proportion of multiracials in the entire pan-Asian American group.
These illustrations show the current demographics of Japanese Americans through visualizing fractions.
Note that "Japanese" does not include those identified as "Okinawan".
7 out of 10 Japanese Americans live on the West Coast
Honolulu, Hawai'i is the only metropolitain area where Japanese Americans outnumber any other ethnicity
2 out of 5 Japanese Americans identify as multracial
3 out of 50 Japanese Americans identify as Japanese and another pan-Asian ethnic group (ex. Japanese and Vietnamese, etc)
17 out of 50 Japanese Americans identify as Japanese and a non-Asian ethnic group (ex. Japanese and Mexican, etc)
All data comes from the 2010 US Census