This paper attempts to prove the proper grounds of the Social Geodialectological study on the word atlas of the accent in Japan. We should discuss positively about the word-accent atlases in future, although the comparative dialectology had been maintained the systematical method for a long time. The following 4 points are discovered: l.Tsu┌rubega┐, as the Tokyo dialect accent, has covered over the Central Japan since 1960. 2. ┌Tsu┐bega, which is a special accent, has been increased suddenly among the youth since 1980. 3. Because we became not to use the "tsurube" in daily life, the youth had confused the name of the comedian with "Tsurube" as a well bucket. 4. ┌Tsu┐bega, which was different from the big two accents of East and West Japan, happend to emerge according to these complex reasons. Comparing with the dialect atlases of several decades, we can promote to study the accents geodialectologically.