Dakuon etc

When the character of the dot marks for voiced sound is stricken, it uses it by two masses. The first mass strikes only the point of five.
The second mass strikes 50 sounds.For instance, if it wants to strike it, it bites and [to] is stricken to the second mass with [ga].

youon,youdakuon,youhandakuon

When the character of "[Ya;]", "[Yu;]", and "[Yo;]" is stricken, it uses it by two masses.
The first mass strikes youon only the point of four. Similarly, the first mass strikes the point of 4 and 5 in youdakuon, and the first mass strikes the point of 4 and 6 in youhandakuon.

tokusyuon