diff --git a/kadai3-1/edm20627/go.mod b/kadai3-1/edm20627/go.mod
new file mode 100644
index 00000000..0333a74b
--- /dev/null
+++ b/kadai3-1/edm20627/go.mod
@@ -0,0 +1,3 @@
+module github.com/edm20627/gopherdojo-studyroom/kadai3-1/edm20627
+
+go 1.15
diff --git a/kadai3-1/edm20627/main.go b/kadai3-1/edm20627/main.go
new file mode 100644
index 00000000..1bfd36b0
--- /dev/null
+++ b/kadai3-1/edm20627/main.go
@@ -0,0 +1,26 @@
+package main
+
+import (
+	"os"
+	"time"
+
+	"github.com/edm20627/gopherdojo-studyroom/kadai3-1/edm20627/typing"
+)
+
+var words = []string{
+	"go",
+	"java",
+	"ruby",
+	"php",
+	"javascript",
+	"python",
+	"kotlin",
+	"swift",
+	"c",
+}
+
+var gameTime = 20 * time.Second
+
+func main() {
+	typing.Start(os.Stdin, os.Stdout, words, gameTime)
+}
diff --git a/kadai3-1/edm20627/typing/typing.go b/kadai3-1/edm20627/typing/typing.go
new file mode 100644
index 00000000..56b9263a
--- /dev/null
+++ b/kadai3-1/edm20627/typing/typing.go
@@ -0,0 +1,44 @@
+package typing
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"time"
+)
+
+func Start(r io.Reader, w io.Writer, words []string, gameTime time.Duration) int {
+	var score int
+	timeLimit := time.After(gameTime)
+	ch := input(r)
+	fmt.Fprintln(w, "game start!!")
+
+L:
+	for _, word := range words {
+		fmt.Fprintln(w, word)
+		fmt.Fprint(w, ">")
+		select {
+		case answer := <-ch:
+			if word == answer {
+				score++
+			}
+		case <-timeLimit:
+			fmt.Fprintf(w, "\ntime out!!\n")
+			break L
+		}
+	}
+	fmt.Fprintln(w, "score: ", score)
+	return score
+}
+
+func input(r io.Reader) <-chan string {
+	ch := make(chan string)
+	go func() {
+		s := bufio.NewScanner(r)
+		for s.Scan() {
+			ch <- s.Text()
+		}
+		close(ch)
+	}()
+	return ch
+}
diff --git a/kadai3-1/edm20627/typing/typing_test.go b/kadai3-1/edm20627/typing/typing_test.go
new file mode 100644
index 00000000..16bf9997
--- /dev/null
+++ b/kadai3-1/edm20627/typing/typing_test.go
@@ -0,0 +1,92 @@
+package typing_test
+
+import (
+	"bytes"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/edm20627/gopherdojo-studyroom/kadai3-1/edm20627/typing"
+)
+
+var words = []string{
+	"go",
+	"java",
+	"ruby",
+	"php",
+	"javascript",
+	"python",
+	"kotlin",
+	"swift",
+	"c",
+}
+
+func TestStart(t *testing.T) {
+	cases := []struct {
+		name     string
+		gameTime time.Duration
+		answer   []string
+		score    int
+	}{
+		{
+			name:     "success",
+			gameTime: 20 * time.Second,
+			answer: []string{
+				"go",
+				"java",
+				"ruby",
+				"php",
+				"javascript",
+				"python",
+				"kotlin",
+				"swift",
+				"c",
+			},
+			score: 9,
+		},
+		{
+			name:     "2 typos",
+			gameTime: 20 * time.Second,
+			answer: []string{
+				"typo1",
+				"typo2",
+				"ruby",
+				"php",
+				"javascript",
+				"python",
+				"kotlin",
+				"swift",
+				"c",
+			},
+			score: 7,
+		},
+		{
+			name:     "timeout",
+			gameTime: 0 * time.Second,
+			answer: []string{
+				"go",
+				"java",
+				"ruby",
+				"php",
+				"javascript",
+				"python",
+				"kotlin",
+				"swift",
+				"c",
+			},
+			score: 0,
+		},
+	}
+
+	for _, c := range cases {
+
+		t.Run(c.name, func(t *testing.T) {
+			input := bytes.NewBufferString(strings.Join(c.answer, "\n"))
+			output := new(bytes.Buffer)
+			score := typing.Start(input, output, words, c.gameTime)
+			if c.score != score {
+				t.Errorf("expected %d, but got %d", c.score, score)
+			}
+		})
+	}
+}