diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
index 490dd6e..4609ed3 100644
--- a/app/controllers/users_controller.rb
+++ b/app/controllers/users_controller.rb
@@ -16,6 +16,11 @@ def show
     end
     render_404 if @user.nil?
 
+    User.transaction do
+      @user.lock!
+      @user.update_tw_account(@user_tw_account)
+    end
+
     #Words取得
     @words = @user.words.all
     words_p = @words.partition{|w| w.alive?}
@@ -32,26 +37,42 @@ def show
   end
 
   def report_history
-      #ログインしていないと見られない
-      if !logged_in?
-        redirect_to root_path
-        return
+    #ログインしていないと見られない
+    if !logged_in?
+      redirect_to root_path
+      return
+    end
+    @client = client_new
+
+    current_user.reports.all.uniq{ |rp| rp.reported_id }.each do |rp|
+      if rp.reported.screen_name.nil? or rp.reported.screen_name.blank?
+        User.transaction do
+          rp.reported.lock!
+          acc = @client.user(rp.reported.twid.to_i)
+          rp.reported.update_tw_account(acc)
+        end
       end
-      @client = client_new
+    end
+
+    @rphists = current_user.reports.all.order("created_at DESC")
   end
 
   def report
     if params[:ajax_tag] == 'report'
       @user = User.find(params[:reported_id])
-      @client = client_new
-      @wordstr = params[:word]
-      @user_tw_account = @client.user(@user.twid.to_i)
       render_404 if @user.nil?
+
       if params[:word].blank?
         @result = "blank"
         return
       end
+
+      @client = client_new
+      @wordstr = params[:word]
+      @user_tw_account = @client.user(@user.twid.to_i)
+
       @word = @user.words.find_by(name: params[:word])
+
       if !(@word.nil?)
         if !(@word.report_available?)
           #通報期限切れ
@@ -59,14 +80,23 @@ def report
         elsif @word.detected
           @result = "alreadyreported"
         else
-          @word.detect_by(current_user)
-          current_user.reports.create(reported: @user, word_str: params[:word], succeed: true)
-          current_user.save
+          User.transaction do
+            me = current_user
+            @user.lock! # 摘発した相手のデータを更新するのでロックする
+            me.lock!
+            @word.detect_by(me)
+            me.reports.create(reported: @user, word_str: params[:word], succeed: true)
+            me.save!
+          end
           @result = "success"
         end
       else
-        current_user.reports.create(reported: @user, word_str: params[:word], succeed: false)
-        current_user.save
+        User.transaction do
+          me = current_user
+          me.lock!
+          me.reports.create(reported: @user, word_str: params[:word], succeed: false)
+          me.save!
+        end
         @result = "fail"
       end
     else
diff --git a/app/helpers/users_helper.rb b/app/helpers/users_helper.rb
index 65a6260..9d7fa78 100644
--- a/app/helpers/users_helper.rb
+++ b/app/helpers/users_helper.rb
@@ -2,17 +2,27 @@ module UsersHelper
   def render_users_home
     @client = client_new
 
-    @user = current_user
     @user_tw_account = @client.user(current_user.twid.to_i)
+    @user = current_user
 
-    #鍵垢判定
-    if @user.is_secret != @user_tw_account.protected?
-      @user.is_secret = @user_tw_account.protected?
-      @user.save
-    end
+    User.transaction do
+      @user.lock!
 
-    @user.refresh_wordcaches(@client)
-    @user.words_reset(@client)
+      @user.update_tw_account(@user_tw_account)
+
+      @user.refresh_wordcaches(@client)
+      @user.words_reset(@client)
+
+      @detected_word = []
+      @user.words.select{ |w| w.detected && !w.noticed_detection }.each do |word|
+        word.noticed_detection = true
+        word.save!
+        detector = User.find(word.detectorid)
+        next if detector.nil?
+        word.detectoraccount = @client.user(detector.twid.to_i)
+        @detected_word.push(word)
+      end
+    end
 
     #Words取得
     @words = @user.words.all
diff --git a/app/models/user.rb b/app/models/user.rb
index 411a522..2e3c446 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -61,10 +61,10 @@ def refresh_wordcaches(client)
     end
 
     yesterdayswords.each do |w|
-      w.save
+      w.save!
     end
     todayswords.each do |w|
-      w.save
+      w.save!
     end
 
     self.get_todays_score(nil)
@@ -101,7 +101,6 @@ def words_reset(client)
   def get_score(client)
     #基準スコア（アップデート前のスコア）に単語スコアとレポートスコアを加算しキャッシュに保存
     self.current_score_cache = self.score + self.get_words_score(nil) + self.get_reports_score(nil)
-    self.save
     return self.current_score_cache
   end
 
@@ -114,7 +113,7 @@ def get_todays_score(client)
     self.reports.each do |rp|
       self.todayscore += rp.succeed ? 100 : -20 if rp.today?
     end
-    self.save
+    self.save!
     return self.todayscore
   end
 
@@ -134,4 +133,16 @@ def get_reports_score(client)
     end
     return reportscore
   end
+
+  def update_tw_account(user_tw_account)
+    self.name = user_tw_account.name
+    self.screen_name = user_tw_account.screen_name
+    self.url = user_tw_account.url.to_s
+    self.imgurl = ApplicationController.helpers.get_twpic_uri(user_tw_account)
+    #鍵垢判定
+    if self.is_secret != user_tw_account.protected?
+      self.is_secret = user_tw_account.protected?
+    end
+    self.save!
+  end
 end
diff --git a/app/models/word.rb b/app/models/word.rb
index 25e167b..d14a896 100644
--- a/app/models/word.rb
+++ b/app/models/word.rb
@@ -42,4 +42,6 @@ def yesterday?
   def report_available?
     return (self.created_at.localtime("+09:00") > (Time.now - 1.hour).localtime("+09:00").beginning_of_day)
   end
+
+  attr_accessor :detectoraccount
 end
diff --git a/app/views/users/_detected.html.erb b/app/views/users/_detected.html.erb
index c57f2db..9996c28 100644
--- a/app/views/users/_detected.html.erb
+++ b/app/views/users/_detected.html.erb
@@ -1,21 +1,13 @@
-<% @words.select{|w| w.detected && !w.noticed_detection }.each do |word| %>
-
-<% word.noticed_detection = true %>
-<% word.save %>
-<% detector = User.find(word.detectorid) %>
-<% next if detector.nil? %>
-<% detectoraccount = @client.user(detector.twid.to_i) %>
-
+<% @detected_word.each do |word| %>
 <div class="alert alert-danger text-center" role="alert">
   <h4 class="alert-heading">通告</h4>
   <small>
     <p>貴方のスパイ活動が察知されました。<br/>貴方へのペナルティとして100ポイントが減算されます。</p>
     <p>摘発された暗号：「<%= word.name %>」</p>
-    <p>摘発者は<%=detectoraccount.name%>(@<%=detectoraccount.screen_name%>)であると思われます。</p>
-    <%= link_to "情報を共有する", tweetlink("私が所持していた暗号「#{word.name}」が#{detectoraccount.name}( @#{detectoraccount.screen_name} )によって暴かれてしまった..."), class: "btn btn-danger", target: "_new" %>
+    <p>摘発者は<%=word.detectoraccount.name%>(@<%=word.detectoraccount.screen_name%>)であると思われます。</p>
+    <%= link_to "情報を共有する", tweetlink("私が所持していた暗号「#{word.name}」が#{word.detectoraccount.name}( @#{word.detectoraccount.screen_name} )によって暴かれてしまった..."), class: "btn btn-danger", target: "_new" %>
     <hr>
     <p class="text-sm mb-0">未摘発の暗号が残っている場合、貴方はまだ活動を継続することが出来ます。</p>
   </small>
 </div>
-
 <% end %>
diff --git a/app/views/users/_user_header.html.erb b/app/views/users/_user_header.html.erb
index 3f9abba..fb2ab50 100644
--- a/app/views/users/_user_header.html.erb
+++ b/app/views/users/_user_header.html.erb
@@ -1,9 +1,3 @@
-<% user.name = @user_tw_account.name %>
-<% user.screen_name = @user_tw_account.screen_name %>
-<% user.url = @user_tw_account.url.to_s %>
-<% user.imgurl = get_twpic_uri(@user_tw_account) %>
-<% user.save %>
-
 <div class="media mb-3">
   <%= link_to image_tag(user.imgurl, size: "96x96" , alt: user.name, class: "mr-3 rounded-circle"), user.url, target:"_new" %>
   <div class="media-body">
diff --git a/app/views/users/report_history.html.erb b/app/views/users/report_history.html.erb
index f5ca029..941e704 100644
--- a/app/views/users/report_history.html.erb
+++ b/app/views/users/report_history.html.erb
@@ -1,5 +1,4 @@
 <h2>摘発履歴</h2>
-<% rphists = current_user.reports.all.order("created_at DESC") %>
 
 <table class="table">
   <thead>
@@ -11,16 +10,7 @@
     </tr>
   </thead>
   <tbody>
-    <% rphists.each do |rp| %>
-
-    <% if rp.reported.screen_name.nil? or rp.reported.screen_name.blank? %>
-      <% acc = @client.rp(rp.reported.twid.to_i) %>
-      <% rp.reported.name = acc.name %>
-      <% rp.reported.screen_name = acc.screen_name %>
-      <% rp.reported.url = acc.url.to_s %>
-      <% rp.reported.imgurl = get_twpic_uri(acc) %>
-      <% rp.reported.save %>
-    <% end %>
+    <% @rphists.each do |rp| %>
     <tr>
       <td><%= "#{rp.reported.name}(@#{rp.reported.screen_name})" %></td>
       <td><%= rp.word_str %></td>
diff --git a/app/views/words/_words.html.erb b/app/views/words/_words.html.erb
index f4047aa..ced7181 100644
--- a/app/views/words/_words.html.erb
+++ b/app/views/words/_words.html.erb
@@ -25,6 +25,6 @@
     <td><%= @user.get_score(nil) %></td>
   </tr>
 </table>
-<% if !@todayswords.empty? %>
+<% if !@todayswords.empty? && @todayswords.first.cached_at != nil %>
 <p>※ <%= smart_time_to_str(@todayswords.first.cached_at) %> 現在の情報です</p>
 <% end %>