Howdy Masashige!
How active are you talking about? 
And if you are talking about healing keys, well…we sometimes lack healers online to get a guild key group going, so I’m certain you would get pulled in right away…lol!
We always have a tank available, and more than likely the dps up for it.
Right now we generally have 10-12 people online every night, we seem to be busier late nite…like 10pm-2am EST. Still plugging through raids even though we are fighting the attendance boss.
For raids we are looking for DPS with a healing offspec that can switch easily if needed. Do you happen to dps on any of your healing toons?
We are a bit more of a casual group, so sometimes we are missing some of our core healers.
Anyhow, check out our guild spam and let me know if you are interested: [H]Revered with Death - What's your End Game?
Best of luck with your search!
Cheers,
Tillae