Both Shueisha and Kodansha, the two of largest Japanese print conglomerates have announced that the publications of all of their respective monthly and weekly manga magazines such as Weekly Shonen and Shonen Jump will go on as scheduled. But 1-2 day delays to the newsstands in many parts of the country is to be expected however, due to fuel shortages and the severe damage to the roads caused by the quake. Unfortunately, I couldn't find anything about this current disasters' effect on Hakusensha and their Young Animal magazine. Perhaps SK members who can read Japanese might find out some useful info about this straight from the YA site?