imarku Santoku Knife 7 Inch: problems, parts and running costs

Checked: 2026-10-19

Summary

The 7Cr17MoV steel is soft for a kitchen knife: it arrives very sharp but loses its bite within days to a week of regular use, so this is a knife for cooks who will hone and sharpen it on schedule. There are no consumables; the only recurring cost is a honing rod or whetstone. It is a good buy at USD 25–50 and a harder sell near USD 70.

Common problems and fixes

Edge dulls quickly — the most common complaint: the reviewer of a USD 50 imarku gyuto noted the steel “doesn’t hold an edge for very long” [4], and KnifeKnowledge notes the factory edge loses its bite after about a week and needs honing [5]. Fix: hone regularly and restore the edge with a 1000-grit whetstone; 7Cr17MoV is easy to sharpen [10]. Warranty: 1-year limited per the refund policy, though the FAQ says limited lifetime [8][9].
Mediocre fit and finish — unpolished spine, sharp heel, rough seams where the handle meets the blade, and a bolster that bit into the hand [4][7]. No fix reported.
Quality control varies — uneven grinds and handles that do not sit flush are reported between knives [6]. Buy from a seller with free returns; imarku’s free return shipping applies only to verified manufacturing defects or incorrect items [8].
Warranty terms conflict — the refund policy says 1-year limited warranty while the FAQ and collections pages say limited lifetime [8][9]. Use the 1-year term unless a specific order grants more.

Parts and consumables

No replaceable parts or consumables reported.

Yearly running cost

There are no consumables. The only recurring cost is maintenance: a honing rod or a 1000-grit whetstone to restore the edge, because the soft steel needs frequent honing and sharpening [10]. The inputs report no prices for these tools, so a yearly total is not enough data.

When it is a good buy

imarku’s own store listed the Phantom Series P9 at USD 69.99 in October 2026, marked down from USD 139.99, with the orange-handle version at USD 69.99 against an USD 89.99 regular price [1][2]. A Canada storefront listed the 7-inch santoku at USD 23.75 [12], and Chefs Resources reviewed an imarku 7Cr17MoV knife around USD 50 in 2016 [7]. The independent reviewer’s guidance was not to spend more than about USD 50 on an imarku knife [4]: at roughly USD 25–50 this santoku is a defensible budget workhorse, while near USD 70 direct it is a harder sell because better-established budget knives sit nearby. The named alternative is the Misen chef’s knife at USD 94 — The Kitchn framed imarku as the budget alternative to it [11] — which is the better choice when you want a more established budget knife; if you want an edge that lasts for months, harder steels such as VG-10 or AUS-10 hold an edge longer than 7Cr17MoV at the same hardness [10].