Comparison of Chinese, Japanese and Korean Endings.

Char  Ending  Tang    Tungdzih  Cant   Mand   Korean  Japanese   Vietnamese
十    -P      *zhip   zhip      sap6   shi2   sip     juu        thập
一    -T      qit4    it        yat1   yi1    il      ichi,itsu  nhất
亦    -K      iëk4    yec       yik6   yi4    yek     yaku       diệc
今    -M      gyim1   cim       gam1   jin1   kum     kon        kim
丸    -N      huɑn    won       jyun2  wan2   hwan    gan        hoàn
亡    -NG     miäng1  vang      mong4  gang1  mang    mou        vong

Tang = Tang Dynasty Chinese
Cant = Cantonese
Mand = Mandarin

Mandarin lost all Old Chinese endings except -n and -ng. Maybe they survive in Mandarin Chinese tones.

Cantonese kept all those endings, although some -p turned to -t.

Korean turns Old Chinese -t ending to -l.

Japanese turns Old Chinese -p and -ng into a lengthened vowel. -t turns to -chi or -tsu, -k to -ku and -m to -n.