diff --git a/data/uking_functions.csv b/data/uking_functions.csv
index c45fc44a..22e7244d 100644
--- a/data/uking_functions.csv
+++ b/data/uking_functions.csv
@@ -63646,7 +63646,7 @@ Address,Quality,Size,Name
 0x0000007100b18994,O,000008,_ZN4sead15CriticalSection7tryLockEv
 0x0000007100b1899c,O,000008,_ZN4sead15CriticalSection6unlockEv
 0x0000007100b189a4,O,000060,_ZN4sead5MutexC1Ev
-0x0000007100b189e0,U,000060,_ZN4sead5MutexC1EPNS_4HeapE
+0x0000007100b189e0,O,000060,_ZN4sead5MutexC1EPNS_4HeapENS_9IDisposer14HeapNullOptionE
 0x0000007100b18a1c,O,000052,_ZN4sead5MutexD1Ev
 0x0000007100b18a50,O,000060,_ZN4sead5MutexD0Ev
 0x0000007100b18a8c,O,000008,_ZN4sead5Mutex4lockEv
@@ -84099,13 +84099,13 @@ Address,Quality,Size,Name
 0x0000007100fc7348,U,000224,
 0x0000007100fc7428,U,000036,
 0x0000007100fc744c,U,000096,_ZN3aal6System8postCalcEi
-0x0000007100fc74ac,U,000032,physicsAllocCollisionStuff
-0x0000007100fc74cc,U,000024,
-0x0000007100fc74e4,U,000128,
-0x0000007100fc7564,U,000068,
-0x0000007100fc75a8,U,000076,
-0x0000007100fc75f4,U,000020,
-0x0000007100fc7608,U,000052,
+0x0000007100fc74ac,O,000032,_ZN4ksys4phys13CollisionInfo4makeEPN4sead4HeapERKNS2_14SafeStringBaseIcEE
+0x0000007100fc74cc,O,000024,_ZN4ksys4phys13CollisionInfo4freeEPS1_
+0x0000007100fc74e4,O,000128,_ZN4ksys4phys13CollisionInfoC1ERKN4sead14SafeStringBaseIcEE
+0x0000007100fc7564,O,000068,_ZN4ksys4phys13CollisionInfoD1Ev
+0x0000007100fc75a8,O,000076,_ZN4ksys4phys13CollisionInfoD0Ev
+0x0000007100fc75f4,O,000020,_ZN4ksys4phys17CollisionInfoBaseD2Ev
+0x0000007100fc7608,O,000052,_ZN4ksys4phys17CollisionInfoBaseD0Ev
 0x0000007100fc763c,O,000064,_ZN4ksys4phys16ContactPointInfo4makeEPN4sead4HeapEiRKNS2_14SafeStringBaseIcEEiii
 0x0000007100fc767c,O,000024,_ZN4ksys4phys16ContactPointInfo4freeEPS1_
 0x0000007100fc7694,O,000076,_ZN4ksys4phys16ContactPointInfoC1ERKN4sead14SafeStringBaseIcEEiii
diff --git a/src/KingSystem/Physics/CMakeLists.txt b/src/KingSystem/Physics/CMakeLists.txt
index ac725dc3..479c28be 100644
--- a/src/KingSystem/Physics/CMakeLists.txt
+++ b/src/KingSystem/Physics/CMakeLists.txt
@@ -99,6 +99,7 @@ target_sources(uking PRIVATE
 
   System/physCharacterControllerParam.cpp
   System/physCharacterControllerParam.h
+  System/physCollisionInfo.cpp
   System/physCollisionInfo.h
   System/physConstraint.cpp
   System/physConstraint.h
diff --git a/src/KingSystem/Physics/System/physCollisionInfo.cpp b/src/KingSystem/Physics/System/physCollisionInfo.cpp
new file mode 100644
index 00000000..ef8f4360
--- /dev/null
+++ b/src/KingSystem/Physics/System/physCollisionInfo.cpp
@@ -0,0 +1,23 @@
+#include "KingSystem/Physics/System/physCollisionInfo.h"
+#include "KingSystem/Physics/System/physSystem.h"
+
+namespace ksys::phys {
+
+CollisionInfo* CollisionInfo::make(sead::Heap* heap, const sead::SafeString& name) {
+    return System::instance()->allocCollisionInfo(heap, name);
+}
+
+void CollisionInfo::free(CollisionInfo* info) {
+    System::instance()->freeCollisionInfo(info);
+}
+
+CollisionInfo::CollisionInfo(const sead::SafeString& name) : sead::INamable(name) {
+    // FIXME: figure out what this is
+    mList.initOffset(0x10);
+}
+
+CollisionInfo::~CollisionInfo() {
+    mList.clear();
+}
+
+}  // namespace ksys::phys
diff --git a/src/KingSystem/Physics/System/physCollisionInfo.h b/src/KingSystem/Physics/System/physCollisionInfo.h
index 9a252b01..81b28576 100644
--- a/src/KingSystem/Physics/System/physCollisionInfo.h
+++ b/src/KingSystem/Physics/System/physCollisionInfo.h
@@ -1,7 +1,10 @@
 #pragma once
 
+#include <container/seadOffsetList.h>
 #include <container/seadSafeArray.h>
 #include <prim/seadBitFlag.h>
+#include <prim/seadNamable.h>
+#include <prim/seadSafeString.h>
 #include <thread/seadMutex.h>
 #include "KingSystem/Physics/physDefines.h"
 
@@ -21,7 +24,24 @@ public:
 private:
     // One layer mask for layer type (entity/sensor).
     sead::SafeArray<sead::BitFlag32, 2> mLayerMasks;
-    sead::Mutex mMutex;
+    sead::Mutex mMutex{nullptr,
+                       sead::IDisposer::HeapNullOption::DoNotAppendDisposerIfNoHeapSpecified};
+};
+
+class CollisionInfo : public CollisionInfoBase, public sead::INamable {
+public:
+    static CollisionInfo* make(sead::Heap* heap, const sead::SafeString& name);
+    static void free(CollisionInfo* info);
+
+    explicit CollisionInfo(const sead::SafeString& name);
+    ~CollisionInfo() override;
+
+    static constexpr size_t getListNodeOffset() { return offsetof(CollisionInfo, mListNode); }
+
+private:
+    // FIXME: type
+    sead::OffsetList<void*> mList;
+    sead::ListNode mListNode;
 };
 
 inline sead::BitFlag32& CollisionInfoBase::getLayerMask(ContactLayerType layer_type) {
diff --git a/src/KingSystem/Physics/System/physSystem.h b/src/KingSystem/Physics/System/physSystem.h
index 14b8f365..3e08d3e1 100644
--- a/src/KingSystem/Physics/System/physSystem.h
+++ b/src/KingSystem/Physics/System/physSystem.h
@@ -9,6 +9,7 @@
 
 namespace ksys::phys {
 
+class CollisionInfo;
 class ContactMgr;
 class GroupFilter;
 class MaterialTable;
@@ -55,6 +56,11 @@ public:
     void registerContactPointLayerPair(ContactPointInfoEx* info, ContactLayer layer1,
                                        ContactLayer layer2, bool enabled);
 
+    // 0x00000071012169a4
+    CollisionInfo* allocCollisionInfo(sead::Heap* heap, const sead::SafeString& name) const;
+    // 0x00000071012169ac
+    void freeCollisionInfo(CollisionInfo* info) const;
+
     // 0x0000007101216a20
     void registerRigidBodyForContactSystem(RigidBody* body);