Japanese pronunciation is far more regular than English, and the Reiki words are easier to say than they look. A few simple habits will carry you through almost all of them.
A few simple rules
Vowels are steady and clean — a as in "father," e as in "get," i as in "machine," o as in "go," u as in "flute." Each vowel keeps its sound, syllables are given roughly even weight, and there is no strong stress as in English. Say each part clearly and evenly, and you will be close.
Common Reiki words
The words you will meet most often:
Universal life energy; the practice itself.
Palms held together at the heart.
The felt sense that guides the hands.
Letting the hands be guided intuitively.
A daily energy-cultivation routine.
The "dry bathing" clearing gesture.
Names and lineage
The names in Reiki’s story follow the same gentle rules:
The founder of Reiki.
Who structured the method.
Who brought Reiki west.
These are gentle English approximations, not strict phonetics. Hearing a teacher say the words is always the best guide.