diff --git a/src/yaku.erl b/src/yaku.erl
index 7750c24..969aca1 100644
--- a/src/yaku.erl
+++ b/src/yaku.erl
@@ -17,6 +17,7 @@
          chiitoitsu/2,
          san_shoku_doujun/2,
          san_shoku_douko/2,
+         san_kan_tsu/2,
          kokushi_musou/2,
          ryuu_iisou/2,
          dai_san_gen/2]).
@@ -140,6 +141,12 @@ san_shoku_douko(#game{}, #player{hand=#hand{melds=Melds}=Hand}) ->
     Pons = [M || #meld{type=pon} = M <- Melds],
     lists:any(fun(M) -> san_shoku(M, Hand) end, Pons).
 
+%% @doc Returns true for a San kan tsu hand
+%%      Hand must contain three kans
+san_kan_tsu(#game{}, #player{hand=#hand{melds=Melds}}) ->
+    Kans = [M || M = #meld{type=kan} <- Melds],
+    length(Kans) =:= 3.
+
 %% @doc Returns true for a 7-pair hand.
 -spec chiitoitsu(game(), player()) -> boolean().
 chiitoitsu(#game{}, #player{hand=#hand{tiles=[], melds=Melds}})
diff --git a/test/riichi_yaku_tests.erl b/test/riichi_yaku_tests.erl
index 7955c05..eedd93a 100644
--- a/test/riichi_yaku_tests.erl
+++ b/test/riichi_yaku_tests.erl
@@ -76,6 +76,14 @@ san_shoku_douko_test() ->
                         #meld{type=chii, tiles=[#tile{suit=man, value=V} || V <- [6,7,8]]}]},
     ?assertEqual(true, yaku:san_shoku_douko(#game{}, #player{hand=Hand, drawn={tsumo, #tile{suit=dragon, value=red}}})).
 
+san_kan_tsu_test() ->
+    Hand = #hand{melds=[#meld{type=pair, tiles=lists:duplicate(2, #tile{suit=sou, value=8})},
+                        #meld{type=kan, tiles=[#tile{suit=sou, value=V} || V <- [1,1,1,1]]},
+                        #meld{type=kan, tiles=[#tile{suit=man, value=V} || V <- [1,1,1,1]]},
+                        #meld{type=kan, tiles=[#tile{suit=pin, value=V} || V <- [1,1,1,1]]},
+                        #meld{type=chii, tiles=[#tile{suit=man, value=V} || V <- [6,7,8]]}]},
+    ?assertEqual(true, yaku:san_kan_tsu(#game{}, #player{hand=Hand, drawn={tsumo, #tile{suit=dragon, value=red}}})).
+
 chiitoitsu_test() ->
     Hand = #hand{melds=[#meld{type=pair, tiles=lists:duplicate(2, #tile{suit=pin, value=V})} || V <- lists:seq(1,7)]},
     ?assertEqual(true, yaku:chiitoitsu(#game{}, #player{hand=Hand})).