By Chris Gallagher and Joseph Campbell NISHIARAYA, Japan (Reuters) – A week after a major earthquake struck the west coast of Japan, thousands of people are still without water and electricity and have yet to be told when plans to rebuild can begin. The magnitude 7.6 quake killed at least 168 people on New Year’s Day with 323 reported missing. Sub-zero temperatures and heavy snow and rain have hampered the delivery of aid, leaving thousands with diminishing supplies and little information. Mudslides, boulders and cracks in the road have buried homes and blocked access routes. Those living in a…