1. A recording and reproduction apparatus comprising: information signal recording means for recording an information signal on a recording medium; reproduction means for reading and reproducing the information signal recorded on the recording medium; feature amount detection means for detecting feature amounts of the information signal to be recorded and/or the reproduced information signal; division detection means for detecting divisions of the information signal by using the feature amounts detected by the feature amount detection means; keyword obtaining means for obtaining a keyword for each of a plurality of segmentation sections of the signal information, the keyword being associated with the segmentation section and each of the segmentation sections being specified by two adjacent divisions detected by the division detection means; keyword recording means for recording, for each segmentation section, the keywords obtained by the keyword obtaining means on the recording medium in such a manner as to correspond to each of the segmentation sections of the information signal; user operation input detection means for detecting operation input by a user; user evaluation value generation means for generating a user evaluation value on the basis of the operation input so as to correspond to each of the segmentation sections in such a manner that the operation input by the user is monitored by monitoring detection output of the user operation input detection means and, when the detection output indicates a predetermined reproduction operation that does not request that the information signal be normally reproduced as the operation input by the user while the information signal is being normally reproduced, a user evaluation value in a negative direction is assigned to the operation input; keyword evaluation value accumulation and storage means for accumulating the user evaluation value for each of the keywords and storing the accumulated evaluation value for each of the keywords in such a way that the user evaluation value for each of the segmentation sections, generated by the user evaluation value generation means, is associated with the evaluation value of the keyword of the segmentation section; and recommendation means for referring to the evaluation values of the keywords stored in the keyword evaluation value accumulation and storage means in order to detect the information signal or the segmentation section having a keyword having a large evaluation value as the keyword of the segmentation section from within the information signals or the segmentation sections recorded on the recording medium, and for recommending the information signal or the segmentation section to the user.
5. The recording and reproduction apparatus according to claim 1 , further comprising ranking means for assigning a ranking value in proportion to a user evaluation value to the keyword on the basis of the user evaluation value for each of the keywords stored in the keyword evaluation value accumulation and storage means, wherein the recommendation means detects an information signal or a segmentation section having the same keyword as the keyword having a high ranking value assigned by the ranking means as the keyword of the segmentation section from within the information signals or the segmentation sections recorded on the recording medium, and recommends the information signal or the segmentation section to the user.