The Japanese face is the least expressive of the four, according to new research from researchers at the University of California, Berkeley, and University of Wisconsin, Madison.
The researchers studied facial morphology to determine the relationship between the number of facial bones and the degree of expression.
They then used an algorithm to determine which face types the Japanese population uses the most.
According to the researchers, the Japanese face has “a distinctive, wide and broad facial profile, with high facial expression and minimal expression of facial tissue.”
The study was published in the journal Human Facial Anatomy.
“The Japanese face, unlike many other cultures, does not have a single facial morphology that is completely static and fixed.
Rather, it is a mixture of multiple facial morphologies,” the authors write.
“Thus, the face is characterized by a large variety of facial features that vary depending on the individual’s facial morphology.”
The researchers also noted that the Japanese facial bones are relatively short and not very wide.
The facial morphology of Japanese people is not uniform.
“In addition, facial morphology is not homogeneous among individuals,” they write.
In fact, the researchers found that the facial bones of Japanese men and women are different from each other, with one group of facial skeletons being more pronounced than the other.
This pattern of differences can be seen in facial expressions as well.
The Japanese researchers found the average face shape to be “more angular” than the American and European faces.
And, in contrast to the American face, the European faces have “a broad and wide facial profile that ranges from slightly to moderately deep.”
In other words, facial expressions are more expressive when facial morphology ranges in depth.
The findings suggest that Japanese people use a wide variety of face expressions, but Japanese people do not use a narrow range of expressions.
The study also suggested that the differences between Japanese and non-Japanese face types can be attributed to cultural differences in facial expression.
“In contrast to Western cultures, Japanese culture does not distinguish between masculine and feminine expressions and has been observed to use a variety of expressions,” the researchers write.
The authors of the study also note that facial morphology does not determine the appearance of facial hair.
According to their data, “a relatively broad range of facial morphology has been reported in Japanese, including both deep and shallow facial features, a variety in the length of facial bone, and facial bone widths that vary from 2 to 10 mm.”
The Japanese are not the only ones who are interested in facial morphology.
Japanese scientists have been studying facial morphology for decades.
A 2004 study by researchers at Kyoto University, in collaboration with the National Institute of Mental Health, looked at more than 50,000 facial images and compared them to data on the facial skeleton.
It found that “most facial morphology was found to be between 2.3 and 2.8 cm wide.”
But Japanese facial morphology can vary even within the same individual.
An online database of facial photographs found in Japan collected in 2009 shows that the face shape of people from Japan is “much more complex than that of Western cultures.”
The facial skeleton of a woman from Japan.
These photos were taken by researchers from Kyoto University.