diff --git a/Assets/VRM10/Runtime/Format/Vrm/HumanoidBones.meta b/Assets/VRM10/Runtime/Format/Vrm/HumanoidBones.meta
new file mode 100644
index 000000000..eaef331d5
--- /dev/null
+++ b/Assets/VRM10/Runtime/Format/Vrm/HumanoidBones.meta
@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 4d41602604884abc8efd1db9e40d3ae7
+timeCreated: 1673690279
\ No newline at end of file
diff --git a/Assets/VRM10/Runtime/Format/Vrm/HumanoidBones/Vrm10HumanoidBoneAttribute.cs b/Assets/VRM10/Runtime/Format/Vrm/HumanoidBones/Vrm10HumanoidBoneAttribute.cs
new file mode 100644
index 000000000..f0a4747cd
--- /dev/null
+++ b/Assets/VRM10/Runtime/Format/Vrm/HumanoidBones/Vrm10HumanoidBoneAttribute.cs
@@ -0,0 +1,22 @@
+using UnityEngine;
+
+namespace UniVRM10
+{
+    public readonly struct Vrm10HumanoidBoneAttribute
+    {
+        public Vrm10HumanoidBones Bone { get; }
+        public bool IsRequired { get; }
+        public Vrm10HumanoidBones? ParentBone { get; }
+        public bool? NeedsParentBone { get; }
+        public HumanBodyBones UnityBone { get; }
+
+        public Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones bone, bool isRequired, Vrm10HumanoidBones? parentBone, bool? needsParentBone, HumanBodyBones unityBone)
+        {
+            Bone = bone;
+            IsRequired = isRequired;
+            ParentBone = parentBone;
+            NeedsParentBone = needsParentBone;
+            UnityBone = unityBone;
+        }
+    }
+}
\ No newline at end of file
diff --git a/Assets/VRM10/Runtime/Format/Vrm/HumanoidBones/Vrm10HumanoidBoneAttribute.cs.meta b/Assets/VRM10/Runtime/Format/Vrm/HumanoidBones/Vrm10HumanoidBoneAttribute.cs.meta
new file mode 100644
index 000000000..c2e102754
--- /dev/null
+++ b/Assets/VRM10/Runtime/Format/Vrm/HumanoidBones/Vrm10HumanoidBoneAttribute.cs.meta
@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 6176458f360143afa76a2500e1e3a968
+timeCreated: 1673690667
\ No newline at end of file
diff --git a/Assets/VRM10/Runtime/Format/Vrm/HumanoidBones/Vrm10HumanoidBoneSpecification.cs b/Assets/VRM10/Runtime/Format/Vrm/HumanoidBones/Vrm10HumanoidBoneSpecification.cs
new file mode 100644
index 000000000..80017eddf
--- /dev/null
+++ b/Assets/VRM10/Runtime/Format/Vrm/HumanoidBones/Vrm10HumanoidBoneSpecification.cs
@@ -0,0 +1,111 @@
+using System.Collections.Generic;
+using System.Linq;
+using UnityEngine;
+
+namespace UniVRM10
+{
+    public sealed class Vrm10HumanoidBoneSpecification
+    {
+        /// <summary>
+        /// https://github.com/vrm-c/vrm-specification/blob/master/specification/VRMC_vrm-1.0/humanoid.md
+        /// </summary>
+        private readonly List<Vrm10HumanoidBoneAttribute> _specification = new List<Vrm10HumanoidBoneAttribute>
+        {
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.Hips, true, null, null, HumanBodyBones.Hips),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.Spine, true, Vrm10HumanoidBones.Hips, null, HumanBodyBones.Spine),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.Chest, false, Vrm10HumanoidBones.Spine, null, HumanBodyBones.Chest),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.UpperChest, false, Vrm10HumanoidBones.Chest, true, HumanBodyBones.UpperChest),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.Neck, false, Vrm10HumanoidBones.UpperChest, false, HumanBodyBones.Neck),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.Head, true, Vrm10HumanoidBones.Neck, false, HumanBodyBones.Head),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.LeftEye, false, Vrm10HumanoidBones.Head, null, HumanBodyBones.LeftEye),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.RightEye, false, Vrm10HumanoidBones.Head, null, HumanBodyBones.RightEye),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.Jaw, false, Vrm10HumanoidBones.Head, null, HumanBodyBones.Jaw),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.LeftUpperLeg, true, Vrm10HumanoidBones.Hips, null, HumanBodyBones.LeftUpperLeg),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.LeftLowerLeg, true, Vrm10HumanoidBones.LeftUpperLeg, null, HumanBodyBones.LeftLowerLeg),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.LeftFoot, true, Vrm10HumanoidBones.LeftLowerLeg, null, HumanBodyBones.LeftFoot),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.LeftToes, false, Vrm10HumanoidBones.LeftFoot, null, HumanBodyBones.LeftToes),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.RightUpperLeg, true, Vrm10HumanoidBones.Hips, null, HumanBodyBones.RightUpperLeg),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.RightLowerLeg, true, Vrm10HumanoidBones.RightUpperLeg, null, HumanBodyBones.RightLowerLeg),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.RightFoot, true, Vrm10HumanoidBones.RightLowerLeg, null, HumanBodyBones.RightFoot),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.RightToes, false, Vrm10HumanoidBones.RightFoot, null, HumanBodyBones.RightToes),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.LeftShoulder, false, Vrm10HumanoidBones.UpperChest, false, HumanBodyBones.LeftShoulder),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.LeftUpperArm, true, Vrm10HumanoidBones.LeftShoulder, false, HumanBodyBones.LeftUpperArm),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.LeftLowerArm, true, Vrm10HumanoidBones.LeftUpperArm, null, HumanBodyBones.LeftLowerArm),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.LeftHand, true, Vrm10HumanoidBones.LeftLowerArm, null, HumanBodyBones.LeftHand),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.RightShoulder, false, Vrm10HumanoidBones.UpperChest, false, HumanBodyBones.RightShoulder),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.RightUpperArm, true, Vrm10HumanoidBones.RightShoulder, false, HumanBodyBones.RightUpperArm),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.RightLowerArm, true, Vrm10HumanoidBones.RightUpperArm, null, HumanBodyBones.RightLowerArm),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.RightHand, true, Vrm10HumanoidBones.RightLowerArm, null, HumanBodyBones.RightHand),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.LeftThumbMetacarpal, false, Vrm10HumanoidBones.LeftHand, null, HumanBodyBones.LeftThumbProximal),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.LeftThumbProximal, false, Vrm10HumanoidBones.LeftThumbMetacarpal, true, HumanBodyBones.LeftThumbIntermediate),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.LeftThumbDistal, false, Vrm10HumanoidBones.LeftThumbProximal, true, HumanBodyBones.LeftThumbDistal),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.LeftIndexProximal, false, Vrm10HumanoidBones.LeftHand, null, HumanBodyBones.LeftIndexProximal),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.LeftIndexIntermediate, false, Vrm10HumanoidBones.LeftIndexProximal, true, HumanBodyBones.LeftIndexIntermediate),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.LeftIndexDistal, false, Vrm10HumanoidBones.LeftIndexIntermediate, true, HumanBodyBones.LeftIndexDistal),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.LeftMiddleProximal, false, Vrm10HumanoidBones.LeftHand, null, HumanBodyBones.LeftMiddleProximal),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.LeftMiddleIntermediate, false, Vrm10HumanoidBones.LeftMiddleProximal, true, HumanBodyBones.LeftMiddleIntermediate),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.LeftMiddleDistal, false, Vrm10HumanoidBones.LeftMiddleIntermediate, true, HumanBodyBones.LeftMiddleDistal),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.LeftRingProximal, false, Vrm10HumanoidBones.LeftHand, null, HumanBodyBones.LeftRingProximal),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.LeftRingIntermediate, false, Vrm10HumanoidBones.LeftRingProximal, true, HumanBodyBones.LeftRingIntermediate),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.LeftRingDistal, false, Vrm10HumanoidBones.LeftRingIntermediate, true, HumanBodyBones.LeftRingDistal),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.LeftLittleProximal, false, Vrm10HumanoidBones.LeftHand, null, HumanBodyBones.LeftLittleProximal),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.LeftLittleIntermediate, false, Vrm10HumanoidBones.LeftLittleProximal, true, HumanBodyBones.LeftLittleIntermediate),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.LeftLittleDistal, false, Vrm10HumanoidBones.LeftLittleIntermediate, true, HumanBodyBones.LeftLittleDistal),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.RightThumbMetacarpal, false, Vrm10HumanoidBones.RightHand, null, HumanBodyBones.RightThumbProximal),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.RightThumbProximal, false, Vrm10HumanoidBones.RightThumbMetacarpal, true, HumanBodyBones.RightThumbIntermediate),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.RightThumbDistal, false, Vrm10HumanoidBones.RightThumbProximal, true, HumanBodyBones.RightThumbDistal),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.RightIndexProximal, false, Vrm10HumanoidBones.RightHand, null, HumanBodyBones.RightIndexProximal),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.RightIndexIntermediate, false, Vrm10HumanoidBones.RightIndexProximal, true, HumanBodyBones.RightIndexIntermediate),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.RightIndexDistal, false, Vrm10HumanoidBones.RightIndexIntermediate, true, HumanBodyBones.RightIndexDistal),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.RightMiddleProximal, false, Vrm10HumanoidBones.RightHand, null, HumanBodyBones.RightMiddleProximal),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.RightMiddleIntermediate, false, Vrm10HumanoidBones.RightMiddleProximal, true, HumanBodyBones.RightMiddleIntermediate),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.RightMiddleDistal, false, Vrm10HumanoidBones.RightMiddleIntermediate, true, HumanBodyBones.RightMiddleDistal),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.RightRingProximal, false, Vrm10HumanoidBones.RightHand, null, HumanBodyBones.RightRingProximal),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.RightRingIntermediate, false, Vrm10HumanoidBones.RightRingProximal, true, HumanBodyBones.RightRingIntermediate),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.RightRingDistal, false, Vrm10HumanoidBones.RightRingIntermediate, true, HumanBodyBones.RightRingDistal),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.RightLittleProximal, false, Vrm10HumanoidBones.RightHand, null, HumanBodyBones.RightLittleProximal),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.RightLittleIntermediate, false, Vrm10HumanoidBones.RightLittleProximal, true, HumanBodyBones.RightLittleIntermediate),
+            new Vrm10HumanoidBoneAttribute(Vrm10HumanoidBones.RightLittleDistal, false, Vrm10HumanoidBones.RightLittleIntermediate, true, HumanBodyBones.RightLittleDistal),
+        };
+
+        private readonly Dictionary<Vrm10HumanoidBones, Vrm10HumanoidBoneAttribute> _specDictionary;
+        private readonly Dictionary<Vrm10HumanoidBones, HumanBodyBones> _toUnity;
+        private readonly Dictionary<HumanBodyBones, Vrm10HumanoidBones> _fromUnity;
+
+        private Vrm10HumanoidBoneSpecification()
+        {
+            _specDictionary = _specification.ToDictionary(x => x.Bone, x => x);
+            _toUnity = _specification.ToDictionary(x => x.Bone, x => x.UnityBone);
+            _fromUnity = _specification.ToDictionary(x => x.UnityBone, x => x.Bone);
+        }
+
+        private static Vrm10HumanoidBoneSpecification _instance;
+
+        private static Vrm10HumanoidBoneSpecification Instance
+        {
+            get
+            {
+                if (_instance == null)
+                {
+                    _instance = new Vrm10HumanoidBoneSpecification();
+                }
+                return _instance;
+            }
+        }
+
+        public static Vrm10HumanoidBoneAttribute GetDefine(Vrm10HumanoidBones bone)
+        {
+            return Instance._specDictionary[bone];
+        }
+
+        public static HumanBodyBones ConvertToUnityBone(Vrm10HumanoidBones bone)
+        {
+            return Instance._toUnity[bone];
+        }
+
+        public static Vrm10HumanoidBones ConvertFromUnityBone(HumanBodyBones bone)
+        {
+            return Instance._fromUnity[bone];
+        }
+    }
+}
\ No newline at end of file
diff --git a/Assets/VRM10/Runtime/Format/Vrm/HumanoidBones/Vrm10HumanoidBoneSpecification.cs.meta b/Assets/VRM10/Runtime/Format/Vrm/HumanoidBones/Vrm10HumanoidBoneSpecification.cs.meta
new file mode 100644
index 000000000..8363e8482
--- /dev/null
+++ b/Assets/VRM10/Runtime/Format/Vrm/HumanoidBones/Vrm10HumanoidBoneSpecification.cs.meta
@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 70b2781f30154b7aa8a7d3235934c00f
+timeCreated: 1673714163
\ No newline at end of file
diff --git a/Assets/VRM10/Runtime/Format/Vrm/HumanoidBones/Vrm10HumanoidBones.cs b/Assets/VRM10/Runtime/Format/Vrm/HumanoidBones/Vrm10HumanoidBones.cs
new file mode 100644
index 000000000..10bbabd08
--- /dev/null
+++ b/Assets/VRM10/Runtime/Format/Vrm/HumanoidBones/Vrm10HumanoidBones.cs
@@ -0,0 +1,64 @@
+namespace UniVRM10
+{
+    /// <summary>
+    /// https://github.com/vrm-c/vrm-specification/blob/master/specification/VRMC_vrm-1.0/humanoid.md
+    /// </summary>
+    public enum Vrm10HumanoidBones
+    {
+        Hips = 0,
+        Spine,
+        Chest,
+        UpperChest,
+        Neck,
+        Head,
+        LeftEye,
+        RightEye,
+        Jaw,
+        LeftUpperLeg,
+        LeftLowerLeg,
+        LeftFoot,
+        LeftToes,
+        RightUpperLeg,
+        RightLowerLeg,
+        RightFoot,
+        RightToes,
+        LeftShoulder,
+        LeftUpperArm,
+        LeftLowerArm,
+        LeftHand,
+        RightShoulder,
+        RightUpperArm,
+        RightLowerArm,
+        RightHand,
+        LeftThumbMetacarpal,
+        LeftThumbProximal,
+        LeftThumbDistal,
+        LeftIndexProximal,
+        LeftIndexIntermediate,
+        LeftIndexDistal,
+        LeftMiddleProximal,
+        LeftMiddleIntermediate,
+        LeftMiddleDistal,
+        LeftRingProximal,
+        LeftRingIntermediate,
+        LeftRingDistal,
+        LeftLittleProximal,
+        LeftLittleIntermediate,
+        LeftLittleDistal,
+        RightThumbMetacarpal,
+        RightThumbProximal,
+        RightThumbDistal,
+        RightIndexProximal,
+        RightIndexIntermediate,
+        RightIndexDistal,
+        RightMiddleProximal,
+        RightMiddleIntermediate,
+        RightMiddleDistal,
+        RightRingProximal,
+        RightRingIntermediate,
+        RightRingDistal,
+        RightLittleProximal,
+        RightLittleIntermediate,
+        RightLittleDistal,
+    }
+}
\ No newline at end of file
diff --git a/Assets/VRM10/Runtime/Format/Vrm/HumanoidBones/Vrm10HumanoidBones.cs.meta b/Assets/VRM10/Runtime/Format/Vrm/HumanoidBones/Vrm10HumanoidBones.cs.meta
new file mode 100644
index 000000000..8f3c8a627
--- /dev/null
+++ b/Assets/VRM10/Runtime/Format/Vrm/HumanoidBones/Vrm10HumanoidBones.cs.meta
@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: bbfd7fe4e8e94aa980418d1cb30163cf
+timeCreated: 1673689363
\ No newline at end of file