National Parks out of Hirosaki & map codes

I have opened every link and read all the answers about map codes but have been unable to find an english version on the web. I will be hiring a car at Hirosaki and going to Shirakami-Sanchi and Towada Hachimantai National Park.
I would appreciate some advice about map codes (specifically for these two parks) where I have no phone number to put into the GPS. Any advice or hints about driving to those parks and what to see and routes to take would be gratefully received.!

What specific locations are you looking for in those 2 regions? For Towada Hachimantai National Park there are some mapcodes in the following (3 pages).
http://puchitabi.jp/aomori/area/towada/

For Shirakami Sanchi there are some in the following (3 pages).
http://puchitabi.jp/aomori/area/hirosaki/index.html

If you can read a bit of kanji the Mapion site is very good in finding mapcode as it can pin-point the exact location on the map. For searching places around Shirakami Sanchi you can start with the following page.
http://www.mapion.co.jp/m/40.80545_140.44358111_7/

For places around Towada-ko you can use the following page.
http://www.mapion.co.jp/m/40.61003889_141.20947_7/

Actually you don't have to be bounded by the 2 quoted sample mapion pages as you can zoom in and out and move the cursor to other area or region on the map.