Hachi's week had a not-so-great part and then a much better part. The reason was that we spent time at our old place and then at our new place. At our old place, the number of people on the trails has skyrocketed, and we were frequently meeting people. Some of them were wonderful people who we were glad to see and some of them were not-so-pleasant people.

Hachi's worst moment was when a person suddenly appeared around a blind curve in the trail during our evening hike. The person was well within Hachi's fear threshold - which means that Hachi was terrified. Then, this person kept striding straight at us even though Hachi was barking and lunging wildly. As this was happening, I was trying to get Hachi off the trail and far enough away that he could handle seeing an unfriendly person (he absolutely recognizes the difference between friendly and unfriendly people). The person got so close that it scared me but at least we managed to get out of his path. The icing on the cake was when the person snickered at us. - That incident replayed in my mind for days afterwards.
Fortunately, during a break in remodeling of our new place, we were able to go to Lab Valley for the end of the week. The peace and tranquility of Lab Valley is like balm to the soul. It is where we belong, and I cannot wait to be there all the time!
Hachi is a different dog at Lab Valley. He relaxes. No one seems threatening, and he can frolic happily.
We love our Hachi like crazy. He had a very bad start to life, and overcoming it is a huge challenge. He has made big progress, and I think that it will zoom forward when this transitional phase is over.