By close to the TKC do you mean a semi-stainless, western handled suji?
- Ichimonji TKC: Alla time same same; but I don't think they're currently available outside of Japan; and
- Kagayaki CarboNext: Cheaper, lesser F&F, narrow handle, deserved reputation for really bad OOTB edges. Same type of alloy as the TKC, same blade geometry, same edge characteristics. Beaucoup bang for the buck. A close cousin of the TKCs but even more bang for the buck -- if you can sharpen.
If you mean really good suji... lots of choices. As good as the Kikuichis TKCs are for their price, they're not the only knives of similar value.
If you can live with very reactive carbon, the Misono Sweden
is a great performer AND looker. I like the looks of the Misono better than the Masamoto HC
, but the HC is less reactive and easier to maintain. Call it a draw.
Konosuke HD wa-suji
are comme il faut.
, and as good a knife as any on the planet. However, they are not only wa-handled but at least one step more expensive than the TKCs were.