The dominate line is vertical. It makes the room feel taller, but trash and oddly placed items remove the benefit of height to the room. To improve the room, i would clear the middle space out and put in more horizontal lines.
Two years in Japan meant I have a long, long list of stuff I recommend when people ask me what to do there. I came up with a very long list recently but I have whittled it down to 25 things to do in Japan.