diff --git a/kadai4/yuuyamad/logger.go b/kadai4/yuuyamad/logger.go
new file mode 100644
index 0000000..5c27a4a
--- /dev/null
+++ b/kadai4/yuuyamad/logger.go
@@ -0,0 +1,23 @@
+package main
+
+import (
+	"net/http"
+	"time"
+	"log"
+)
+
+func Logger(inner http.Handler, name string) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		start := time.Now()
+
+		inner.ServeHTTP(w, r)
+
+		log.Printf(
+			"%s\t%s\t%s\t%s",
+			r.Method,
+			r.RequestURI,
+			name,
+			time.Since(start),
+		)
+	})
+}
\ No newline at end of file
diff --git a/kadai4/yuuyamad/main.go b/kadai4/yuuyamad/main.go
new file mode 100644
index 0000000..9320580
--- /dev/null
+++ b/kadai4/yuuyamad/main.go
@@ -0,0 +1,90 @@
+package main
+
+import (
+	"log"
+	"net/http"
+	"github.com/gorilla/mux"
+	"time"
+	"math/rand"
+	"encoding/json"
+)
+
+type Route struct {
+	Name        string
+	Method      string
+	Pattern     string
+	HandlerFunc http.HandlerFunc
+}
+
+type Responce struct {
+	Omikuji    string `json:"omikuji"`
+}
+
+type Routes []Route
+
+var routes = Routes{
+	Route{
+		"Getomikuji",
+		"GET",
+		"/api/v1/omikuji",
+		GetOmikuji,
+	},
+}
+
+var timeNowFunc = time.Now // 関数をグローバル変数に代入
+
+
+func main() {
+	router := NewRouter()
+
+	log.Fatal(http.ListenAndServe(":8080", router))
+
+}
+
+func GetOmikuji(w http.ResponseWriter, r *http.Request){
+	var responce Responce
+	t := timeNowFunc()
+
+	// 1/1 ~ 1/3は絶対大吉
+	if (t.Month() == 1 && t.Day() >= 1 && t.Day() <= 3){
+		responce.Omikuji = "大吉"
+	} else {
+		t := timeNowFunc().UnixNano()
+		rand.Seed(t)
+		s := rand.Intn(6)
+		switch s + 1 {
+		case 1:
+			responce.Omikuji = "凶"
+		case 2, 3:
+			responce.Omikuji = "吉"
+		case 4, 5:
+			responce.Omikuji = "中吉"
+		case 6:
+			responce.Omikuji = "大吉"
+		}
+	}
+
+	w.Header().Set("Content-Type", "application/json; charset=UTF-8")
+	w.WriteHeader(http.StatusOK)
+	if err := json.NewEncoder(w).Encode(responce); err != nil {
+		panic(err)
+	}
+
+}
+func NewRouter() *mux.Router {
+	router := mux.NewRouter().StrictSlash(true)
+	for _, route := range routes {
+		var handler http.Handler
+
+		handler = route.HandlerFunc
+		handler = Logger(handler, route.Name)
+
+		router.
+			Methods(route.Method).
+			Path(route.Pattern).
+			Name(route.Name).
+			Handler(handler)
+	}
+
+	return router
+}
\ No newline at end of file
diff --git a/kadai4/yuuyamad/main_test.go b/kadai4/yuuyamad/main_test.go
new file mode 100644
index 0000000..5c0acfb
--- /dev/null
+++ b/kadai4/yuuyamad/main_test.go
@@ -0,0 +1,56 @@
+package main
+
+import (
+	"testing"
+	"time"
+	"net/http/httptest"
+	"io/ioutil"
+	"github.com/stretchr/testify/assert"
+	"net/http"
+)
+
+const timeformat = "2006-01-02 15:04:06"
+
+func setNow(t time.Time) {
+	timeNowFunc = func() time.Time { return t }
+}
+
+
+func TestGetOmikujiain(t *testing.T) {
+	syogatsu , _ := time.Parse(timeformat, "2018-01-03 14:10:00")
+	heijitu , _ := time.Parse(timeformat, "2018-02-03 14:10:00")
+	heijitu2 , _ := time.Parse(timeformat, "2018-03-03 18:11:11")
+
+	cases := []struct {
+		date      time.Time
+		responce string
+	}{
+		{date: syogatsu, responce: "{\"omikuji\":\"大吉\"}"},
+		{date: heijitu, responce: "{\"omikuji\":\"吉\"}"},
+		{date: heijitu2, responce: "{\"omikuji\":\"中吉\"}"},
+
+	}
+
+	for _, c := range cases {
+		setNow(c.date)
+
+		w := httptest.NewRecorder()
+		r := httptest.NewRequest("GET", "/api/v1/omikuji", nil)
+		GetOmikuji(w, r)
+		rw := w.Result()
+		defer rw.Body.Close()
+
+		if rw.StatusCode != http.StatusOK {
+			t.Fatal("unexpected status code")
+		}
+		b, err := ioutil.ReadAll(rw.Body)
+		if err != nil {
+			t.Fatal("unexpected error")
+		}
+
+		if s := string(b); !assert.JSONEq(t, s, c.responce) {
+			t.Fatalf("unexpected response: %s", s)
+		}
+
+	}
+}
diff --git a/kadai4/yuuyamad/yuuyamad b/kadai4/yuuyamad/yuuyamad
new file mode 100755
index 0000000..d264ba0
Binary files /dev/null and b/kadai4/yuuyamad/yuuyamad differ