diff --git a/kadai3-1/README.md b/kadai3-1/README.md
new file mode 100644
index 0000000..51dcfe5
--- /dev/null
+++ b/kadai3-1/README.md
@@ -0,0 +1,15 @@
+
+## 課題
+
+```
+タイピングゲームを作ろう
+標準出力に英単語を出す（出すものは自由）
+標準入力から1行受け取る
+制限時間内に何問解けたか表示する
+```
+
+## 実装
+
+* [x] `bufio.Scanner`を使って標準入力から1行ずつ読み取りチャンネルに送る。
+* [x] `time.After` を使って時間が来たら知らせるチャンネルを作成。
+* [x] for select を使って、タイマーのチャンネルと標準入力を受け取るチャンネルを待つ。
\ No newline at end of file
diff --git a/kadai3-1/pchatsu/cmd/main.go b/kadai3-1/pchatsu/cmd/main.go
new file mode 100644
index 0000000..309a42a
--- /dev/null
+++ b/kadai3-1/pchatsu/cmd/main.go
@@ -0,0 +1,12 @@
+package main
+
+import (
+	"os"
+
+	"github.com/gopherdojo/dojo3/kadai3-1/pchatsu"
+)
+
+func main() {
+	tg := typinggame.NewTypingGame(60, os.Stdin, os.Stdout)
+	tg.Play()
+}
diff --git a/kadai3-1/pchatsu/questions.go b/kadai3-1/pchatsu/questions.go
new file mode 100644
index 0000000..8367232
--- /dev/null
+++ b/kadai3-1/pchatsu/questions.go
@@ -0,0 +1,81 @@
+package typinggame
+
+var (
+	questions = []string{
+		"time",
+		"person",
+		"year",
+		"way",
+		"day",
+		"thing",
+		"man",
+		"world",
+		"life",
+		"hand",
+		"part",
+		"child",
+		"eye",
+		"woman",
+		"place",
+		"work",
+		"week",
+		"case",
+		"point",
+		"government",
+		"company",
+		"number",
+		"group",
+		"problem",
+		"fact",
+		"good",
+		"new",
+		"first",
+		"last",
+		"long",
+		"great",
+		"little",
+		"own",
+		"other",
+		"old",
+		"right",
+		"big",
+		"high",
+		"different",
+		"small",
+		"large",
+		"next",
+		"early",
+		"young",
+		"important",
+		"few",
+		"public",
+		"bad",
+		"same",
+		"able",
+		"be",
+		"have",
+		"do",
+		"say",
+		"get",
+		"make",
+		"go",
+		"know",
+		"take",
+		"see",
+		"come",
+		"think",
+		"look",
+		"want",
+		"give",
+		"use",
+		"find",
+		"tell",
+		"ask",
+		"work",
+		"seem",
+		"feel",
+		"try",
+		"leave",
+		"call",
+	}
+)
diff --git a/kadai3-1/pchatsu/typing_game.go b/kadai3-1/pchatsu/typing_game.go
new file mode 100644
index 0000000..c5061c9
--- /dev/null
+++ b/kadai3-1/pchatsu/typing_game.go
@@ -0,0 +1,55 @@
+package typinggame
+
+import (
+	"bufio"
+	"io"
+	"strconv"
+	"time"
+)
+
+type TypingGame struct {
+	limitSec int
+	correct  int
+	r        io.Reader
+	w        io.Writer
+}
+
+func NewTypingGame(limitSec int, r io.Reader, w io.Writer) *TypingGame {
+	tg := TypingGame{
+		limitSec: limitSec,
+		r:        r,
+		w:        w,
+	}
+	return &tg
+}
+
+func readAnswer(r io.Reader, ch chan<- string) {
+	sc := bufio.NewScanner(r)
+	for sc.Scan() {
+		ch <- sc.Text()
+	}
+}
+
+func (t *TypingGame) Play() {
+	ch := make(chan string)
+	go readAnswer(t.r, ch)
+
+	timer := time.After(time.Duration(t.limitSec) * time.Second)
+	question := questions[t.correct]
+
+	t.w.Write([]byte(question + "\n"))
+LOOP:
+	for {
+		select {
+		case s := <-ch:
+			if question == s {
+				t.correct++
+				question = questions[t.correct%len(questions)]
+				t.w.Write([]byte(question + "\n"))
+			}
+		case <-timer:
+			t.w.Write([]byte("time over! correct:" + strconv.Itoa(t.correct)))
+			break LOOP
+		}
+	}
+}
diff --git a/kadai3-1/pchatsu/typing_game_test.go b/kadai3-1/pchatsu/typing_game_test.go
new file mode 100644
index 0000000..c66936c
--- /dev/null
+++ b/kadai3-1/pchatsu/typing_game_test.go
@@ -0,0 +1,85 @@
+package typinggame
+
+import (
+	"bytes"
+	"io"
+	"reflect"
+	"testing"
+)
+
+func TestNewTypingGame(t *testing.T) {
+	type args struct {
+		limitSec int
+		r        io.Reader
+		w        io.Writer
+	}
+	tests := []struct {
+		name string
+		args args
+		want *TypingGame
+	}{
+		{"#1 normal case", args{5, bytes.NewBufferString("a"), &bytes.Buffer{}}, &TypingGame{limitSec: 5, r: bytes.NewBufferString("a"), w: &bytes.Buffer{}}},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			w := &bytes.Buffer{}
+			if got := NewTypingGame(tt.args.limitSec, tt.args.r, w); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("NewTypingGame() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func Test_readAnswer(t *testing.T) {
+	type args struct {
+		r io.Reader
+	}
+	tests := []struct {
+		name string
+		args args
+		want []string
+	}{
+		{"#1 normal case", args{bytes.NewBufferString("foo\nbar\nbaz\n")}, []string{"foo", "bar", "baz"}},
+		{"#2 normal case", args{bytes.NewBufferString("foo\nbar\nbaz")}, []string{"foo", "bar"}},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			ch := make(chan string)
+			go readAnswer(tt.args.r, ch)
+			for _, w := range tt.want {
+				if got := <-ch; got != w {
+					t.Errorf("channel got = %v, want %v", got, w)
+				}
+			}
+		})
+	}
+}
+
+func TestTypingGame_Play(t *testing.T) {
+	// for tests
+	questions = []string{"foo", "bar", "baz"}
+
+	tests := []struct {
+		name        string
+		r           io.Reader
+		wantCorrect int
+		wantW       string
+	}{
+		{"#1 normal case", bytes.NewBufferString("foo\nbar\n"), 2, "foo\nbar\nbaz\ntime over! correct:2"},
+		{"#2 1 mistake case", bytes.NewBufferString("foo\nbaz\nbar"), 2, "foo\nbar\nbaz\ntime over! correct:2"},
+		{"#3 loop case", bytes.NewBufferString("foo\nbar\nbaz\nfoo\n"), 4, "foo\nbar\nbaz\nfoo\nbar\ntime over! correct:4"},
+	}
+	for _, tt := range tests {
+		w := &bytes.Buffer{}
+		tg := NewTypingGame(1, tt.r, w)
+		t.Run(tt.name, func(t *testing.T) {
+			tg.Play()
+			if gotCorrect := tg.correct; gotCorrect != tt.wantCorrect {
+				t.Errorf("correct got = %v, want %v", gotCorrect, tt.wantW)
+			}
+			if gotW := w.String(); gotW != tt.wantW {
+				t.Errorf("io.Writer got = %v, want %v", gotW, tt.wantW)
+			}
+		})
+	}
+}