Saving a list to json

Hey all, I'm having trouble saving out to a json file. I built up a small mock program to show what I'm attempting to do.

 public class Contoller : MonoBehaviour
 {
     private string installPath;
     private bool directoryExists;
 
     private string jsonString;
 
     private Store lots_o_stuff = new Store ();
     private Product food = new Product ();
     private Product cloths = new Product ();
 
     void Start ()
     {
         installPath = Path.GetDirectoryName (Application.dataPath);
         checkForDirectory ();
         checkForStore ();
         Debug.Log (lots_o_stuff.product [0].item_Name [0]);
     }
 
     private void checkForDirectory ()
     {
         try {
             if (!Directory.Exists (installPath + "/Configs")) {
                 Directory.CreateDirectory (installPath + "/Configs");
                 directoryExists = true;
             } else {
                 directoryExists = true;
             }
         } catch {
             Debug.Log ("Failed Directory");
         }
     }
 
     private void checkForStore ()
     {
         if (directoryExists) {
             try {
                 if (!File.Exists (installPath + "/Configs/Store.json")) {
                     buildDefaultStore ();
                     jsonString = JsonUtility.ToJson (lots_o_stuff, true);
                     File.WriteAllText (installPath + "/Configs/Store.json", jsonString);
                 }
             } catch {
                 Debug.Log ("Failed Store");
             }
         }
     }
 
     private void buildDefaultStore ()
     {
         lots_o_stuff.store_Name = "Lots O Stuff";
         lots_o_stuff.store_Address = "123 Adress St.";
         string[] food_Items = new string[] { "Banana", "Apple", "Shrimp", "Ice Cream" };
         string[] cloth_Items = new string[] { "Shirt", "Pants", "Belt", "Boots" };
         food.Type = "Food";
         food.item_Name.AddRange (food_Items);
         cloths.Type = "Cloths";
         cloths.item_Name.AddRange (cloth_Items);
         lots_o_stuff.product.Add (food);
         lots_o_stuff.product.Add (cloths);
     }
 }
 
 public class Store
 {
     public string store_Name;
     public string store_Address;
     public List<Product> product = new List<Product> ();
 }
 
 public class Product
 {
     public string Type;
     public List<string> item_Name = new List<string> ();
 }

When I go to save out, this is all that gets saved.

 {
     "store_Name": "Lots O Stuff",
     "store_Address": "123 Adress St."
 }

The list "Product" doesn't even show up empty.

Does anyone know a way to make this work?