his whole life is dedicated to making sure everything is smooth and perfect for his lord

If this book was written by American Japanese, critics would probably note that the novel reflexes the drama of being a child in an immigrant Asian family where a child has to serve his parents with the zeal of the old-school butler 😃😉

Ishiguro masterfully conveys the feeling of internal struggle through a subtly crafted and emotionally charged narrative

Sounds great. This reminds me stories and novels of Norwegian author Tarjei Vesaas. Not much action, few characters and all of them are simple people living simple lives but it's so much about inner experiences and struggles; one of my favorite writers. The Birds is the most significant novel of his (but don't read about the novel on wiki - spoilers there).