Sweets and drinking

When the host takes the chashaku, and starts scooping tea into the bowl:

JapaneseEnglishSpeaker
Okashi wo douzo.Please enjoy your sweet.Host to first guest
Chodai itashimasu.I will have my sweet.First guest to host
Osaki ni.Please excuse me for going first.First guest to next guest

When you receive your tea:

JapaneseEnglishSpeaker
Oshoban itashimasu.I will join you.To the guest above you
Osaki ni.Please excuse me for going first.To the guest below you
Otemae chodai itashimasuThank you for the tea.To the host

After everybody is done drinking:

JapaneseEnglishSpeaker
Douzo oshimai kudasai.Please finish.First guest to host
Oshimai itashimasu.I will finish.Host to first guest

Haiken

After the host finishes closing:

JapaneseEnglishSpeaker
Douzo o-natsume, o-chashaku no haiken wo.May we please see the natsume and the chashaku?First guest to host

After you’ve taken everything to your seat, before you start viewing your first object:

JapaneseEnglishSpeaker
Osaki ni.Please excuse me for going first.To the guest below you

After dougu is returned to the host:

JapaneseEnglishSpeaker
O-natsume no katachi wa?What is the shape of the natsume?First guest
[Rikyugata chuu natsume] de gozaimasu.It is a [Rikyu-style middle-sized natsume].Host
O-nuri wa?And the lacquer?First guest
[Sotetsu] de gozaimasu.It was lacquered by [Sotetsu].Host
O-chashaku no osaku wa?Who carved the chashaku?First guest
[Zabosai Oiemoto] de gozaimasu.[Zabosai Oiemoto] carved the chashaku.Host
Gomei wa?And its poetic name?First guest
[Aki no you] de gozaimasu.It is named [Autumn Leaf].Host

Natsume vs other usuchaki

Natsume are not the only containers used in usucha. There are many others. If you encounter a shape that is different from the standard natsume shape, it is referred to as an usuchaki, or an usuki.