This plugin convert Japanese 2 bites characters to 1 bite character.

It means;

１,２,３,４,５,６,７,８,９,０, Ａ,Ｂ,Ｃ,Ｄ,Ｅ,Ｆ,Ｇ,Ｈ,Ｉ,Ｊ,Ｋ,Ｌ,Ｍ,Ｎ,Ｏ,Ｐ,Ｑ,Ｒ,Ｓ,Ｔ,Ｕ,Ｖ,Ｗ,Ｘ,Ｙ,Ｚ, ａ,ｂ,ｃ,ｄ,ｅ,ｆ,ｇ,ｈ,ｉ,ｊ,ｋ,ｌ,ｍ,ｎ,ｏ,ｐ,ｑ,ｒ,ｓ,ｔ,ｕ,ｖ,ｗ,ｘ,ｙ,ｚ

are converted to

1,2,3,4,5,6,7,8,9,0, A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z, a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z

for each.