Eh....Togashi hasn't done long, weekly chapters in a while. I don't really care to use the word 'lazy', but he goes at his own pace. I'm pretty sure he and his wife is rich, so it's not like he has to worry about getting paid for work, so he's not in a hurry. To put it frankly, he doesn't have to worry about work, so he works when he feels like it.
Edit: Also, I did hear he had actual health issues since the latest chapter, so that's obviously good reasons. Before then for years, he had taken frequent and long breaks though without notice about health issues which is usually given like in the case of the author of D. Gray-Man. Ah. Apparently, he mentioned health issues since YYH then. Nevermind.