This gallery is BIG, and that's cause the images are uncompressed PNGs. This gallery is meant for potential translators, who compress the images after editing anyway. I always go through the trouble of cleaning Ohigetan scans and I figure I can potentially help someone translate it to a different language by uploading my work.
There are three images in JPG format: the front and back cover, and page 9. Which I could not get below the 50 MB size limit. But its minimally compressed so it should be fine.
If you're thinking of translating feel free to use; make sure to download the original files and not the downsampled 1200x files. There IS an English translation of this which will be uploaded sometime this month.