diff --git a/Assets/ProceduralModeling/Scripts/ProceduralTree.cs b/Assets/ProceduralModeling/Scripts/ProceduralTree.cs
index b322ee0..e0a1cda 100644
--- a/Assets/ProceduralModeling/Scripts/ProceduralTree.cs
+++ b/Assets/ProceduralModeling/Scripts/ProceduralTree.cs
@@ -247,7 +247,7 @@ protected TreeBranch(int generation, int generations, Vector3 from, Vector3 tang
 float ratio; // [0.0 ~ 1.0]
 if(count == 1)
 {
-						// 分岐数が位置である場合(0除算を回避)
+						// 分岐数が1である場合(0除算を回避)
 ratio = 1f;
 } else
 {
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..89bceef
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2017 Indie Visual Lab
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
</div><div class="naked_ctrl">
<form action="/index.cgi/contrast" method="get" name="gate">
<p><a href="http://altstyle.alfasado.net">AltStyle</a> によって変換されたページ <a href="https://github.com/crisious/UnityGraphicsProgramming/compare/master...IndieVisualLab:UnityGraphicsProgramming:master.diff">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="https://github.com/crisious/UnityGraphicsProgramming/compare/master...IndieVisualLab:UnityGraphicsProgramming:master.diff" size="22" /></label> <label>モード: <select name="naked_post_mode">
<option value="default">デフォルト</option>
<option value="speech">音声ブラウザ</option>
<option value="ruby">ルビ付き</option>
<option value="contrast" selected="selected">配色反転</option>
<option value="larger-text">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>