They are Kanteisho issued by NBTHK. Most of the descriptions are fixed pattern and you can understand 80-90 % of them by referring the following Dr. Richard Stein's web site.
http://home.earthlink.net/~steinrl/origami.htm
The Kanteisho on the left is for the blade. The specific description says that
Katana, unsigned ((attributed to) Mihara), length ni shaku ku bu han (about 63.5 cm).
The Kanteisho certifies the katana as a Hozon Token and was issued on Apr. 3rd, 2006.
The rignt Kanteisho is for Koshirae. The Koshirae was certified as a Hozon Tosogu on Feb. 16th, 2006. The Koshirae was described as Kuro Isokusanuri saya Uchigatana Koshirae(黒磯草塗鞘打刀拵). That means a Koshirae for a Uchigatana with black lacqurer work of seaweed pattern. Other descriptions are details of F/K, Menuki, and Tsuba.