That is the date side. Showa ....... The makers mei is the two Kanji side. Also the stamp is a Nagoya Arsenal acceptance stamp, not a Seki or Showa stamp.
Kanenori is a known smith. Here is an example of his signature (Mei) and notice it also has the Nagoya arsenal mark.
http://www.japaneseswordindex.com/oshigata/kanenori.jpg
Hope this helps.
Rich
-------------------------------------------------------
Richard Stein, PhD, FAIC
Japanese Sword Guide
http://www.japaneseswordindex.com/nihonto.htm