imarku Santoku Knife 7 Inch: Review, Pros & Cons

Summary

A budget 7-inch santoku in 7Cr17MoV stainless steel, sold by imarku as the Phantom Series P9, for home cooks who want a sharp, light Japanese-style blade. It arrives sharp and comfortable, but the soft steel dulls quickly, so check the seller’s return policy before you buy.

Strengths

Independent reviewers agree it is very sharp out of the box.
The Pakkawood handle is comfortable; one reviewer called imarku handles “some of the favorites we’ve ever tested”.
7Cr17MoV is rust-resistant and easy to restore with a honing rod or a 1000-grit whetstone.
At 6.9 oz it is light, and a sibling imarku knife cut tomato smoothly and basil cleanly in independent testing.
The scalloped hollow edge reduces sticking when you cut wet food.

Weaknesses

The soft steel loses its edge relatively quickly; the reviewer of a $50 imarku gyuto noted it “doesn’t hold an edge for very long”.
Fit and finish are mediocre: unpolished spine, sharp heel, rough seams where the handle meets the blade.
Quality control varies between knives; uneven grinds and handles that do not sit flush are reported.
Dense produce is a struggle: an imarku 8-inch 7Cr17MoV chef knife hesitated on carrots, shallots and onions despite being sharp.
Hardness is listed two ways on the same page: 58 HRC in the spec table and 56 ± 2 HRC in a second block.
Warranty terms conflict across imarku’s own pages: 1 year in some places, “limited lifetime” in others.

Verified specifications

Model	imarku 7-inch santoku in 7Cr17MoV stainless steel (Phantom Series P9).
Dimensions	7-inch blade, 1.75-inch blade height, 2.5 mm blade thickness, 12-inch total length, 6.9 oz.
Edge angle	15–18° per side, double bevel.
Hardness	58 HRC in the spec table; a second block on the same page says 56 ± 2 HRC.
Handle	Pakkawood.
Edge style	scalloped hollow (granton) edge to reduce sticking.
Construction	described as forged; some listings claim full tang.
In the box	black gift box.
Warranty	1-year limited warranty on the refund-policy and product pages; the FAQ and collections pages say limited lifetime.

Full research notes and sources

Steel and edge retention

7Cr17MoV is a Chinese budget-to-mid stainless steel, generally hardened to about 55–58 HRC, with good corrosion resistance and easy sharpening but only adequate edge retention. The Cooking Guild calls that retention “adequate, not remarkable”, and KnifeKnowledge notes the factory edge loses its bite after about a week and needs honing.

The practical implication is that this is a knife for people willing to hone and sharpen regularly. If you maintain it, it performs well for the price. If you want an edge that lasts for months, look at harder steels.

Cutting performance

No instrumented test of this exact santoku exists. The Rational Kitchen tested sibling imarku knives with a BESS sharpness tester and calipers: one 8-inch 7Cr17MoV chef knife measured BESS 235 g out of the box, 6.5 oz actual against 6.9 oz listed, and a 2.5 mm spine at the handle. Those are sibling numbers, not this knife’s.

The blade seemed to stain easily, and the bolster bit into the hand. Re-grinding the edge from a steep angle to a shallower one improved cutting, something a decent knife should not require out of the box. The same reviewer called the knife light, comfortable and pretty, and “for the home cook this may be an excellent addition”.

Marketing, origin and quality control

imarku markets Japanese heritage the company does not document: a 1949 founding, “108 traditional forging steps” and “32,768 layers”.

Steel labeling is vague too: several listings say “German HC stainless steel” or “high carbon stainless steel” without naming the steel.

Customer-service complaints are the most common negative theme in owner feedback. Free return shipping applies only to verified manufacturing defects or incorrect items, and there is no after-sales support for products not bought through authorized channels. Independent reviewers recommend buying through a marketplace with free returns as the safest path. A commenter in r/chefknives described imarku as “the most popular budget knife” with a high-carbon blade, a very nice wooden handle and very light weight.

imarku’s own store listed the Phantom Series P9 at $69.99 in October 2026, marked down from $139.99, with the orange-handle version at $69.99 against an $89.99 regular price. A Canada storefront listed the 7-inch santoku at $23.75, and Chefs Resources reviewed an imarku 7Cr17MoV knife around $50 in 2016. The Kitchn framed the imarku 8-inch chef knife as a budget alternative to Misen’s $94 knife.

The independent reviewer’s guidance was not to spend more than about $50 on an imarku knife. At roughly $25–50 this santoku is a defensible budget workhorse: sharp out of the box, comfortable, easy to sharpen and rust-resistant. Near $70 from imarku direct it is a harder sell, because better-established budget knives sit nearby.

Is it worth it?

This is a knife for cooks who will hone it and sharpen it on schedule. Maintained, it performs well for the price; neglected, the soft steel dulls within days of heavy use. If you want an edge that lasts for months, a harder steel serves you better. At $25–50 it is an easy recommendation with the maintenance caveat attached; at imarku’s own $69.99 sale price the value is thinner.

Which model this is

This page covers the imarku 7-inch santoku in 7Cr17MoV stainless steel, sold by imarku as the Phantom Series P9 with a Pakkawood handle and a scalloped hollow edge; the same knife is also sold with an orange handle under identical specs.

The US listing for this knife is ASIN B0865TNBKC.

Do not confuse it with imarku’s Gintama Series G03 santoku, which uses a one-piece stainless-steel handle and lower pricing, or the newer Kyokujin TS02 santoku in 10Cr15CoMoV (59±2 HRC, 12±2° per side), a different and harder steel.