diff --git a/.gitignore b/.gitignore
new file mode 100644
index 000000000..d6d5c4a00
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+#.gitignoreはgitの管理対象外を指定するファイル。
+output.log
diff --git a/README.md b/README.md
index 9e7d03700..41714aff4 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,3 @@
 # git-practice
 このリポジトリはGit動画講座用です．
+自分のリポジトリで更新
\ No newline at end of file
diff --git a/delete_soon.txt b/delete_soon.txt
new file mode 100644
index 000000000..e69de29bb
diff --git a/namechaged2.txt b/namechaged2.txt
new file mode 100644
index 000000000..af6dc42f3
--- /dev/null
+++ b/namechaged2.txt
@@ -0,0 +1 @@
+newfile.txt作成
\ No newline at end of file
diff --git a/new2file.txt b/new2file.txt
new file mode 100644
index 000000000..ad966edb7
--- /dev/null
+++ b/new2file.txt
@@ -0,0 +1 @@
+created new2file
\ No newline at end of file
diff --git a/newfile.txt b/newfile.txt
new file mode 100644
index 000000000..969323ef6
--- /dev/null
+++ b/newfile.txt
@@ -0,0 +1 @@
+main branchで新規作成。
\ No newline at end of file