diff --git a/src/blog/post-1.md b/src/blog/post-1.md
index 99a974c..9caafec 100644
--- a/src/blog/post-1.md
+++ b/src/blog/post-1.md
@@ -5,7 +5,6 @@ author: 'Nakahara Daisuke'
 tags: ["introduction"]
 ---
 
-# Hello!
 Hello, my name is Daisuke.
 
 This is my first blog post. Nice to meet you.
diff --git a/src/blog/post-2.md b/src/blog/post-2.md
deleted file mode 100644
index 54b30b0..0000000
--- a/src/blog/post-2.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-title: 'I Have Finally Published My Blog Website'
-pubDate: 2025-05-15
-author: 'Nakahara Daisuke'
-tags: []
----
-
-I have finally published my blog website. 
-
-Its infrastructure relies on AWS, and I use Microsoft Copilot to manage the hosting. 
-
-This tool is particularly useful because it allows me to inquire about the contents of tags opened in Microsoft Edge.
-
-Thank you.
diff --git a/src/layouts/BaseLayout.astro b/src/layouts/BaseLayout.astro
index 3e068d8..ef3c97a 100644
--- a/src/layouts/BaseLayout.astro
+++ b/src/layouts/BaseLayout.astro
@@ -15,9 +15,7 @@ const { pageTitle } = Astro.props;
     </head>
     <body>
         <Header />
-        <h1 class="page-title">
-            {pageTitle}
-        </h1>
+        <h1>{pageTitle}</h1>
         <slot />
         <Footer>
         <script>
@@ -25,9 +23,3 @@ const { pageTitle } = Astro.props;
         </script>
     </body>
 </html>
-
-<style>
-  .page-title {
-      font-size: 2.8rem;
-  }
-</style>
\ No newline at end of file
diff --git a/src/layouts/MarkdownPostLayout.astro b/src/layouts/MarkdownPostLayout.astro
index 0e7a037..6bc14ce 100644
--- a/src/layouts/MarkdownPostLayout.astro
+++ b/src/layouts/MarkdownPostLayout.astro
@@ -12,7 +12,8 @@ const optionsForDate = {
 ---
 
 <BaseLayout pageTitle={frontmatter.title}>
-  <p>Created on: {frontmatter.pubDate.toLocaleDateString("en-US", optionsForDate)}</p>
+  <p>Created on: {frontmatter.pubDate.toLocaleDateString("ja-JP", optionsForDate)}</p>
+  <p>Written by: {frontmatter.author}</p>
   <p><em>{frontmatter.description}</em></p>
   <div class="tags">
     {
@@ -23,9 +24,7 @@ const optionsForDate = {
       ))
     }
   </div>
-  <article class="markdown-content">
-    <slot />
-  </article>
+  <slot />
 </BaseLayout>
 
 <style>
@@ -46,20 +45,4 @@ const optionsForDate = {
     font-size: 1.15em;
     background-color: #f8fcfd;
   }
-
-  .markdown-content {
-      font-family: sans-serif;
-      font-size: 1.2rem;
-  }
-
-  .markdown-content h1 {
-      font-size: 1.9rem;
-  }
-  .markdown-content h2 {
-      font-size: 1.75rem;
-  }
-  .markdown-content h3 {
-      font-size: 1.5rem;
-  }
-
 </style>
diff --git a/src/pages/blog.astro b/src/pages/blog.astro
index a48cbe4..4a4fe24 100644
--- a/src/pages/blog.astro
+++ b/src/pages/blog.astro
@@ -20,10 +20,10 @@ const pageTitle = "Latest Posts";
 				<BlogPost
 					url={`/posts/${post.id}/`}
 					title={post.data.title}
-					datetime={post.data.pubDate.toLocaleDateString("en-US", {
+					datetime={post.data.pubDate.toLocaleDateString("ja-JP", {
 						year: "numeric",
-						month: "long",
-						day: "numeric",
+						month: "2-digit",
+						day: "2-digit",
 					})}
 				/>
 			))
diff --git a/src/pages/index.astro b/src/pages/index.astro
index 06ba9b9..bcdd227 100644
--- a/src/pages/index.astro
+++ b/src/pages/index.astro
@@ -45,10 +45,10 @@ const allPosts = await getCollection("blog");
 				<BlogPost
 					url={`/posts/${post.id}/`}
 					title={post.data.title}
-					datetime={post.data.pubDate.toLocaleDateString("en-US", {
+					datetime={post.data.pubDate.toLocaleDateString("ja-JP", {
 						year: "numeric",
-						month: "long",
-						day: "numeric",
+						month: "2-digit",
+						day: "2-digit",
 					})}
 				/>
 			))
diff --git a/src/pages/posts/[slug].astro b/src/pages/posts/[slug].astro
index d97b3a2..87b3ea2 100644
--- a/src/pages/posts/[slug].astro
+++ b/src/pages/posts/[slug].astro
@@ -16,4 +16,4 @@ const { Content } = await render(post);
 
 <MarkdownPostLayout frontmatter={post.data}>
     <Content />
-</MarkdownPostLayout>
\ No newline at end of file
+</MarkdownPostLayout>
