I will consider if I get one digitally, as I want to avoid keeping or waiting for delivery of papers.
Actually, I am reading this one currently, but too early to celebrate (as I don’t know if I can keep my learning regular - I started my grammar diary just now, nonetheless) (And that website is only up to N4…)
You see, it’s not like I can’t read Japanese, more like I can’t understand well, nor can I reproduce well.
I appear to saw one before, like NINJAL, or…
As I tried to ask, I found one in my browsing history 
https://tsukubawebcorpus.jp/search/
I also saw this one, but don’t know a best way to use it. - https://shonagon.ninjal.ac.jp/search_form
Actually, now I found several in References: section as well. Of note:-
- NINJAL’s verb handbook in 意味別 section
- いろどり - Coloring - Speaking Focus (well, this is correctly in Online: section)
- 日本語の先生 - Japanese teacher - Everyday Laid-back Japanese Teacher
- 絵でわかる - Understand with pictures
Translated to English, but I still like it, would be Japbase.