diff --git a/config/rel_slices.yml b/config/rel_slices.yml
index 494e2201..933105be 100644
--- a/config/rel_slices.yml
+++ b/config/rel_slices.yml
@@ -1220,6 +1220,9 @@ ef_hanabi_dummy.c:
 ef_hanatiri.c:
     .text: [0x80610478, 0x8061061C]
     .data: [0x806D2C08, 0x806D2C20]
+ef_kasamizu.c:
+    .text: [0x806127BC, 0x80612960]
+    .data: [0x806D2DE0, 0x806D2E08]
 ef_killer.c:
     .text: [0x80614178, 0x8061481C]
     .rodata: [0x8064C680, 0x8064C6C0]
diff --git a/src/ef_kasamizu.c b/src/ef_kasamizu.c
index bc21e585..5e63d8bf 100644
--- a/src/ef_kasamizu.c
+++ b/src/ef_kasamizu.c
@@ -1,5 +1,7 @@
 #include "ef_effect_control.h"
 
+#include "m_common_data.h"
+
 static void eKasamizu_init(xyz_t pos, int prio, s16 angle, GAME* game, u16 item_name, s16 arg0, s16 arg1);
 static void eKasamizu_ct(eEC_Effect_c* effect, GAME* game, void* ct_arg);
 static void eKasamizu_mv(eEC_Effect_c* effect, GAME* game);
@@ -18,17 +20,32 @@ eEC_PROFILE_c iam_ef_kasamizu = {
 };
 
 static void eKasamizu_init(xyz_t pos, int prio, s16 angle, GAME* game, u16 item_name, s16 arg0, s16 arg1) {
-    // TODO
+    eEC_CLIP->make_effect_proc(eEC_EFFECT_KASAMIZU, pos, NULL, game, &angle, item_name, prio, arg0, arg1);
 }
 
 static void eKasamizu_ct(eEC_Effect_c* effect, GAME* game, void* ct_arg) {
-    // TODO
+    static xyz_t base_offset = {0, 45.0f, -20.0f};
+    xyz_t pos;
+    s16 angle = *(s16*)ct_arg;
+    Matrix_RotateY(angle, 0);
+    Matrix_Position(&base_offset, &pos);
+    xyz_t_add(&effect->position, &pos, &effect->position);
+    effect->effect_specific[0] = angle;
+    effect->timer = 24;
 }
 
 static void eKasamizu_mv(eEC_Effect_c* effect, GAME* game) {
-    // TODO
+    GAME_PLAY* play = (GAME_PLAY*)game;
+    if (eEC_CLIP != (eEC_EffectControl_Clip_c*)0) {
+        int mEnv_NowWeather();
+        if (mEnv_NowWeather() == mEnv_WEATHER_RAIN && play->game_frame & 1) {
+            xyz_t pos = effect->position;
+            eEC_CLIP->effect_make_proc(eEC_EFFECT_KASAMIZUTAMA, pos, effect->prio, effect->effect_specific[0], game,
+                                       effect->item_name, 0, 0);
+        }
+    }
 }
 
 static void eKasamizu_dw(eEC_Effect_c* effect, GAME* game) {
-    // TODO
+    // Nothing
 }