it need w3m and https://gist.github.com/taroyanaka/5029d040bce91348803b49552c28be6c

get_game_review.sh

#! /bin/sh

#get ASIN
ASIN=`ruby ./amazon.rb $1|grep "ASIN" -A 1|head -n 2|grep Text|grep -o -E '\".*\"'|tr -d "\""`

#get review text
w3m "https://www.amazon.co.jp/portal/customer-reviews/$ASIN" > /tmp/review.txt

#review rate
cat /tmp/review.txt|grep "のうち.\..$"|uniq|grep -o -E "[0-9]\.[0-9]$"

#review count
cat /tmp/review.txt|grep -E "^[0-9]+$"