diff --git a/data/odyssey_functions.csv b/data/odyssey_functions.csv
index 03398ee..24f99af 100644
--- a/data/odyssey_functions.csv
+++ b/data/odyssey_functions.csv
@@ -27927,10 +27927,10 @@ Address,Quality,Size,Name
 0x000000710045b03c,O,000012,_ZNK20PlayerJudgeSameNerve5judgeEv
 0x000000710045b048,O,000004,_ZN20PlayerJudgeSameNerve5resetEv
 0x000000710045b04c,O,000004,_ZN20PlayerJudgeSameNerve6updateEv
-0x000000710045b050,U,000024,_ZN19PlayerJudgeSandSinkC1EPK19IUsePlayerCollisionPK20PlayerSandSinkAffect
-0x000000710045b068,U,000080,_ZNK19PlayerJudgeSandSink5judgeEv
-0x000000710045b0b8,U,000004,_ZN19PlayerJudgeSandSink5resetEv
-0x000000710045b0bc,U,000004,_ZN19PlayerJudgeSandSink6updateEv
+0x000000710045b050,O,000024,_ZN19PlayerJudgeSandSinkC1EPK19IUsePlayerCollisionPK20PlayerSandSinkAffect
+0x000000710045b068,O,000080,_ZNK19PlayerJudgeSandSink5judgeEv
+0x000000710045b0b8,O,000004,_ZN19PlayerJudgeSandSink5resetEv
+0x000000710045b0bc,O,000004,_ZN19PlayerJudgeSandSink6updateEv
 0x000000710045b0c0,U,000024,_ZN16PlayerJudgeSleepC1EPK15PlayerStateWait
 0x000000710045b0d8,U,000008,_ZNK16PlayerJudgeSleep5judgeEv
 0x000000710045b0e0,U,000004,_ZN16PlayerJudgeSleep5resetEv
diff --git a/src/Player/PlayerJudgeSandSink.cpp b/src/Player/PlayerJudgeSandSink.cpp
new file mode 100644
index 0000000..2928cd1
--- /dev/null
+++ b/src/Player/PlayerJudgeSandSink.cpp
@@ -0,0 +1,17 @@
+#include "Player/PlayerJudgeSandSink.h"
+
+#include "Player/PlayerSandSinkAffect.h"
+#include "Util/PlayerCollisionUtil.h"
+
+PlayerJudgeSandSink::PlayerJudgeSandSink(const IUsePlayerCollision* collider,
+                                         const PlayerSandSinkAffect* sandSinkAffect)
+    : mCollider(collider), mSandSinkAffect(sandSinkAffect) {}
+
+void PlayerJudgeSandSink::reset() {}
+
+void PlayerJudgeSandSink::update() {}
+
+bool PlayerJudgeSandSink::judge() const {
+    return mSandSinkAffect->isSink() ||
+           (rs::isCollidedGround(mCollider) && rs::isCollisionCodeSandSink(mCollider));
+}
diff --git a/src/Player/PlayerJudgeSandSink.h b/src/Player/PlayerJudgeSandSink.h
new file mode 100644
index 0000000..e91cbc5
--- /dev/null
+++ b/src/Player/PlayerJudgeSandSink.h
@@ -0,0 +1,23 @@
+#pragma once
+
+#include "Library/HostIO/HioNode.h"
+
+#include "Player/IJudge.h"
+
+class IUsePlayerCollision;
+class PlayerSandSinkAffect;
+
+class PlayerJudgeSandSink : public al::HioNode, public IJudge {
+public:
+    PlayerJudgeSandSink(const IUsePlayerCollision* collider,
+                        const PlayerSandSinkAffect* sandSinkAffect);
+
+    void reset() override;
+    void update() override;
+    bool judge() const override;
+
+private:
+    const IUsePlayerCollision* mCollider;
+    const PlayerSandSinkAffect* mSandSinkAffect;
+};
+static_assert(sizeof(PlayerJudgeSandSink) == 0x18);
diff --git a/src/Player/PlayerSandSinkAffect.h b/src/Player/PlayerSandSinkAffect.h
new file mode 100644
index 0000000..7b6ecc3
--- /dev/null
+++ b/src/Player/PlayerSandSinkAffect.h
@@ -0,0 +1,35 @@
+#pragma once
+
+#include <math/seadVector.h>
+
+namespace al {
+class LiveActor;
+}
+class PlayerConst;
+class PlayerInput;
+class IUsePlayerCollision;
+class PlayerEffect;
+
+class PlayerSandSinkAffect {
+public:
+    PlayerSandSinkAffect(const al::LiveActor*, const PlayerConst*, const PlayerInput*,
+                         IUsePlayerCollision*, PlayerEffect*);
+    void clear();
+    bool isSink() const;
+    void update(bool);
+    bool isSinkDeathHeight() const;
+    void reduceVelocity(sead::Vector3f*);
+    bool isEnableCapThrow() const;
+    f32 calcSandSinkDeathRate() const;
+
+private:
+    const al::LiveActor* mPlayer;
+    const PlayerConst* mConst;
+    const PlayerInput* mInput;
+    IUsePlayerCollision* mCollider;
+    PlayerEffect* mEffect;
+    f32 mSinkVelocity;
+    f32 mSinkAmount;
+    bool mIsSafe;
+};
+static_assert(sizeof(PlayerSandSinkAffect) == 0x38);
diff --git a/src/Util/PlayerCollisionUtil.h b/src/Util/PlayerCollisionUtil.h
index f155d1f..d777992 100644
--- a/src/Util/PlayerCollisionUtil.h
+++ b/src/Util/PlayerCollisionUtil.h
@@ -23,5 +23,6 @@ bool isOnGround(const al::LiveActor*, const IUsePlayerCollision*);
 bool isJustLand(const IUsePlayerCollision*);
 void calcGroundNormalOrGravityDir(sead::Vector3f*, const al::LiveActor*,
                                   const IUsePlayerCollision*);
+bool isCollisionCodeSandSink(const IUsePlayerCollision*);
 
 }  // namespace rs