diff --git a/struct/anonymousField.go b/struct/anonymousField.go
new file mode 100644
index 0000000..3e26890
--- /dev/null
+++ b/struct/anonymousField.go
@@ -0,0 +1,36 @@
+package main
+
+import "fmt"
+
+type SampleStruct1 struct {
+	Id int64
+	Name string
+}
+
+type SampleStruct2 struct {
+	SampleStruct1
+	Address string
+}
+
+
+type SampleStruct3 struct {
+	SampleStruct1
+	//	SampleStruct1 // NG!
+	Address string
+}
+
+
+func main() {
+	v1 := SampleStruct2{SampleStruct1{1, "taro"}, "address"}
+	fmt.Println(v1) // {{1 taro} address}
+
+	v2 := SampleStruct2{}
+	fmt.Println(v2) // {{0 } }
+	v2.Id = 2
+	v2.Name = "jiro"
+	v2.Address = "address2"
+	fmt.Println(v2) // {{2 jiro} address2}
+
+	v3 := SampleStruct2{ SampleStruct1: SampleStruct1{1, "taro"} }
+	fmt.Println(v3) // {{1 taro} }
+}
diff --git a/struct/json.go b/struct/json.go
new file mode 100644
index 0000000..f2b07f5
--- /dev/null
+++ b/struct/json.go
@@ -0,0 +1,38 @@
+package main
+
+import (
+	"fmt"
+	"encoding/json"
+)
+
+type SampleStruct1 struct {
+	Id int64
+	Name string
+}
+
+
+type SampleStruct2 struct {
+	TestName string `json:"test_name"`
+}
+
+
+func main() {
+	v1 := SampleStruct1{1, "taro"}
+	if data, err := json.Marshal(v1); err == nil {
+		fmt.Printf("%s\n", data) // {"Id":1,"Name":"taro"}
+
+		v2 := SampleStruct1{}
+		if err := json.Unmarshal(data, &v2); err == nil {
+			fmt.Println(v2) // {1 taro}
+		}
+	} else {
+		fmt.Println(err)
+	}
+
+	v3 := SampleStruct2{}
+	if err := json.Unmarshal([]byte("{ \"test_name\": \"hoge-\" }"), &v3); err == nil {
+		fmt.Println(v3) // {hoge-}
+	} else {
+		fmt.Println(err)
+	}
+}
diff --git a/struct/struct1.go b/struct/struct1.go
new file mode 100644
index 0000000..b41c7ae
--- /dev/null
+++ b/struct/struct1.go
@@ -0,0 +1,28 @@
+package main
+
+import "fmt"
+
+type SampleStruct struct {
+	Id int64
+	Name string
+}
+
+
+func main() {
+	v1 := SampleStruct{1, "taro"}
+	fmt.Println(v1) // {Id:1 Name:taro}
+	hoge(v1)
+	// 値渡し
+	fmt.Println(v1) // {Id:1 Name:taro}
+
+	
+	v2 := SampleStruct{ Name: "jiro" }
+	fmt.Println(v2) // {0 jiro}
+}
+
+func hoge(v SampleStruct) {
+	fmt.Println(v) // {Id:1 Name:taro}
+	v.Id = 2
+	fmt.Println(v) // {Id:2 Name:taro}
+}
+
diff --git a/struct/struct2.go b/struct/struct2.go
new file mode 100644
index 0000000..a5f6ec6
--- /dev/null
+++ b/struct/struct2.go
@@ -0,0 +1,24 @@
+package main
+
+import "fmt"
+
+type SampleStruct struct {
+	Id int64
+	Name, Address string
+}
+
+
+func main() {
+	v1 := SampleStruct{1, "taro", "address"}
+	fmt.Println(v1) // {Id:1 Name:taro Address:address}
+
+	v2 := SampleStruct{1, "taro", "address"}
+	v3 := SampleStruct{1, "jiro", "address"}
+	fmt.Println(v1 == v2) // true
+	fmt.Println(v1 == v3) // false
+	p1 := &v1
+	fmt.Printf("%p\n", p1)
+	(*p1).Id = 2
+	fmt.Println(*p1) // {Id:2 Name:taro Address:address}
+	fmt.Println(v1) // {Id:2 Name:taro Address:address}
+}