面倒なのでソース載せるだけw なお鯖がISO-2022-JPの場合 UTF-8なら文字エンコード変換作業は当然不要
var irc = require('irc') var Twit = require('twit') var Iconv = require('iconv').Iconv var client = new irc.Client('SERVERNAME', 'USERNAME', { port: 6667, channels: ['CHANNEL'] }) jis2utf = new Iconv('ISO-2022-JP', 'UTF-8') var twit = new Twit({ consumer_key:'', consumer_secret:'', access_token:'', access_token_secret:'' }) var users = new Array( "", "", "" ) client.addListener('message', function (from, to, message) { message = jis2utf.convert(message).toString() var tweet = "@"+users.join(" @")+" "+from+":"+message tweet = tweet.substr(0,140) twit.post('statuses/update', { status: tweet}, function(err, data, response) { }) })