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Warning: Trying to access array offset on value of type bool in /home/kkwave/patsukin.com/public_html/wp-content/themes/simplicity2/header-twitter-card.php on line 45 ドワンゴ元会長の川上量生さん、ニコニコ初期の歴史を語る「盛り上げたのはVIPPERではなくネット初心者ユーザー。自社回線に40億円かかった」