diff --git a/StringCheck20261008_ishikawa.java b/StringCheck20261008_ishikawa.java
new file mode 100644
index 0000000..72fca45
--- /dev/null
+++ b/StringCheck20261008_ishikawa.java
@@ -0,0 +1,47 @@
+package mission;
+
+import java.util.Scanner;
+
+public class StringCheck {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		String[] a;
+		a = new String[4];
+		a[0] = "いまなにしてる？";
+		a[1] = "何も入力されていません";
+		a[2] = "投稿文が長すぎます";
+		a[3] = "↓↓↓↓↓↓　投稿されました　↓↓↓↓↓↓";
+		
+		Scanner sc = new Scanner(System.in);
+		String str;
+		while(true) {
+		System.out.println(a[0]);
+		str = sc.nextLine().strip();
+		System.out.println(str);
+		
+		boolean b1 = str.length() == 0;
+		boolean b2 = str.length() > 140;
+		int n = 140 - str.length();
+		
+		if(b1) {
+			System.out.println(a[1]);
+			continue;
+		}else if(b2) {
+			System.out.println(a[2]);
+			continue;
+		}else {
+			System.out.println(b1);
+			System.out.println(b2);
+			System.out.println(n);
+			break;
+		}
+		}
+			System.out.println();
+			System.out.println(a[3]);
+			System.out.println(str);
+		
+		
+	}
+
+}
\ No newline at end of file