This is the annex to chamber A8, having the dimensions 5.0m south-north and 2.1m east-west.

Although grouped with the chambers lying on an east-west axis, the long axis of chamber A9 is actually south-north. It is entered through the east side of its south wall, with an entry designed for an inward opening door.

The entry walls of the passage are decorated with a parade of servants; only one and a third registers having survived on either side, and appear to be mirror images, with the participants facing into chamber A9. The lower full register contains four male servants, each holding a large vase of oil in front of him. They are each accompanied by a column of text. A line of text separates the next register of five men, of which only their legs have survived.

In the lowest register, four servants transport, on poles, two large chest of garments. The text above them says: "Bringing sealed (things) and clothing to ", followed by some of his titles and both of his names. All of the descriptive texts on these walls end with some of his titles and either one or both of his names, so from now I shall use"T, N". Why not try to resolve these from the .
2nd register. - five men drag three large jars of oil on a sledge. The text above these says: "Bringing sfT-oil to T, N ".
3rd register - two servants carry, on a table, two enormous necklaces. The second scene is identical except that they transport a pectoral. Of the text above this register only his some of his titles and names have survived.
4th register - there is a small lower trace of this register, which again showed the transportation of three large jars on a sledge.

At the southern end of this wall, a doorway appears to have been cut through into storeroom A20, after the decoration had been completed. The stones now occupying the space indicate that it was blocked up again in antiquity. The fragment of relief now close to the area was possibly attached during restoration work, and may not in fact belong in this position. An indication of the missing content can be derived from the description of the east wall.

Towards the northern end of the wall and facing south, Mereruka stands with his staff of office in one hand and probably holding a folded cloth in the other (as on the opposite wall) ; his wife holds his leg and breathes the perfume of a lotus flower.

Behind them can be seen the two remaining lower registers :
- register 1 - four individuals pulling a rope-drawn sledge laden with four very large jars. The scene is described in the text above them. It reads: "A boon which the king gives, a boon which Anubis gives, thousand of all (sorts of) ointments for T, N".
- register 2 - two large chests are transported on poles by by four men. Again, the scene is described in the text above them, of which very little now exists.

In front of them, the wall is occupied by processions of servants transporting various goods towards Mereruka () :
In the bottom register :
- three men, each carry two bands of material.
- seven men follow holding the vases of various shapes, all containing oils.
- The remains (due to the ancient damage) of four chests, each being carried on poles by two men.
The scene is described in the text above them, the latter part of which is missing. It reads: "Bringing the first class royal linen and clothing, the first class ointments, which are given to him from the residence as a boon which the king gives to T, N".
Second register :
- four large chests are carried on poles by eight men.
- the following decoration is missing.
Only the beginning of the descriptive text has survived. It reads: "A boon which the king gives, a boon which Anubis gives, thousand of all (sorts of) ointments for T, N".
Third register :
- servants carry tables on which the contents have not survived, towards at least one standing table containing three vessels.

After completion of the decoration, a doorway was cut through this wall into storeroom A15. The opening is lower than normal, at just over 2 metres in height. It was possibly intended to give the deceased's ka easier access to the alter in chamber A13.

This area of the wall appears to have originally contained the large figure of Mereruka, facing east; of which only part of his foot and his staff of office remain, to the east side of the doorway.
Apart from some columnar text in front of Mereruka, the only other remains show that the wall certainly contained the transportation of two crates by four porters, in the bottom register.

The content and design is a near mirror image of the opposite wall. There are differences, but again, all the people involved face south.
Towards the northern end of the wall stands Mereruka with his staff of office in one hand, a folded cloth in the other; his wife (at a much small scale) holds his leg and breathes the perfume of a lotus flower.

Behind them on this wall three registers have survived. In them can be seen :
- register 1 - a stand with three large spouted vessels, then three men pulling a sledge on which are three more large containers. The last vessel is steadied by a man at the rear. The scene is described in the text above them: "A boon which the king gives, a boon which Anubis gives, thousand of all (sorts of) ointments for T, N".
- register 2 - two large chests are transported on poles by four men. Again, the scene is described in the text above them: "Bringing the best clothing (…) T, N".
- register 3 - three tables on which stand, in apparently exaggerated size, two necklaces on the middle one and a pectoral on the two outer ones.

The remainder, southern half of the wall, is occupied by processions of servants transporting various goods towards Mereruka :
In the bottom register :
- three men, each bringing two bands of material.
- seven people holding the vases containing oils.
- four chests are each being carried on poles by two men.
The text above them says: "Bringing the first class royal linen and clothing, the first class ointments, which are given to him from the residence as a boon which the king gives to T, N".
Second register :
- four large chests are carried on poles by eight men.
- five servants follow them, each holding a large spouted vessel.
- at the rear, five more follow carrying long narrow vessels.
The text above says: " (A boon which the king gives ?), a boon which Anubis gives a thousand of cloth to T, N".
Third register :
- servants carry eight tables on which are placed necklaces and other ornaments, towards two tables which have already been placed down. Nothing much remains of the descriptive text.

This chamber lies on the main route to chamber A13, the ultimate focus of the mastaba. Its access from A4 is towards the eastern end of the south wall, almost in line with the opening into A13. The design of this passageway was for a door opening inwards at the A4 end. Once again it was decorated with a parade of servants carrying various items, however, only the east side has survived and here only the lowest register is complete, containing three servants. There is no accompanying text.

The chamber has an overall length of 8.2m east-west and a width of 2.4m for most of its length; the west end narrowing to form a niche, the rear (west) wall of which forms a grooved stela, which could also be classed as a false door. The walls of the chamber are badly damaged, with virtually nothing remaining of the middle section of the south wall.

The chamber contains the entry to the burial chamber, at the western end of the floor; a roughly square shaft. The shaft must have been dug before the mastaba was built, because the north wall of this chamber runs on top of it, a large limestone beam having been placed in the lower course of the wall, to bridge the gap. An iron gate currently bars access to this area, for safety reasons. The shaft is now descended via a modern spiral staircase. Full details of the shaft and burial chamber can be found later.

The only remaining decoration is on the left-hand side of the entry passageway. Only its lowest register has survived, which shows a parade of eleven priests of the mortuary estate carrying an assortment of offerings for Mereruka. The beginning of the text above them is missing, but the remainder states: "all fine (year-offerings ?) which are brought for him by the ka-servants of his estate, for an invocation offering for him there.".

This wall, at the rear of the chamber, has survived almost to its full height. This and the short sections of the north and south walls, which originally contained images of the deceased, are inset from the normal width of the chamber, reducing it from 2.4m to 1.8m and having a depth of 1.0m. The west wall is in the form of a large grooved stela (or false door), of archaic style. The overall appearance is that of a section of a palace facade. Down each of its outer edges is a single column of text; more complete on the right than on the left. These enumerate the titles of Mereruka and both end with his two names. From what remains of the left-hand side, they appear to be mirror image copies. Below the text is a simple figure of Mereruka, looking towards the centre of the false door. Above the centre section (the actual doorway to the other world) is a cylindrical drum containing two short lines of text, giving a few titles and name of the deceased.
However, apart from these three texts, no other graphic decoration exists. What appears to be a single "s" hieroglyph on the central section of the false door stela, is in fact the bolt for the door.

As has already been stated in relation to chamber A8, the quality of this false door does not appear as good as the one of that chamber. Perhaps if it was originally coloured, this might not be true.

Two bas-reliefs were originally sculpted on the north and south walls, framing the stela. Of these, only the northern one remains. This represents the deceased and his wife (at a smaller scale), both standing and facing east, into the chamber. Perhaps these images represent them having left through the false door in order to receive the offerings being brought to them along the north and south walls.
In front of the stela is the remains of an offering table. If it was originally inscribed, then nothing now remains.

This wall contains, at its east end, the entry to chamber A13. It was designed for an door to open into this chamber, not A13.
Like the south wall very little has remained. But from the small surviving section to the left of the exit to A13 it shows that it was similar to the south wall in its design. Its content is again that of Ka-priests carrying an assortment of offerings, but only eight of them now exist. They again head towards the west and Mereruka. At the west end, as has already been mentioned, next to the false door, is the standing figure of Mereruka and his wife. Of the descriptive text, only some of the deceased titles and his names have survived.

Here, at its southern end, is the entry into a decorated annexe, chamber A12. The floor of the entry is at a higher level than either of the two chambers. This is the only occurrence of a stepped entry. The entry is also smaller than the usual 2.4m height, being only just 2 metres high.

The two registers have been preserved at the lower part of the east wall, to the north of the entry into chamber A12. These offer ordinary scenes of butchery and carving of oxen, whose flesh was for an offering to the deceased. The texts above the two scenes this time do not describe the action taking place, but instead record the various conversations of the butchers. For the bottom row: "The altar is as a beautiful feast on this day", "It is a very nice carving (of the bull's head) ", "Bringing of the oxen (for) his ka" and "Let the choice cuts go, raise (?) (them) (to) his ka on this beautiful day.". For the next row: "Hurry you, men! The lector priest is performing the rituals" and "Bring the choice cuts; hurry, for your life!"
To the south of the doorway exists a narrow bas-relief displaying registers showing offering bearers.

The size of this chamber is only 2.7m west to east (3.0m at the top) and 2.1m in width. Yet, in spite of its small size, the decoration on all of the walls has survived to well above half height. The rear (east) wall slopes backwards, the top being further east by approx. 0.3m. This is an indication that the east wall was in fact the outer wall of Kagemni's mastaba, but was possibly re-faced before decoration. The slope of the wall can be seen in .
The entry from A11 was designed for an inward opening door, even though the size of the chamber is small.
The entrance passageway was yet again decorated with servants carrying offerings. Both sides contain two complete registers, with two servants in each (see ). They face out of the chamber and into A11.
Inside the chamber, above the entry, there was originally a stone lintel. This has collapsed, leaving only a small piece on the left-hand side.

At the bottom of this short section wall, facing the doorway, three men transport a large chest of offerings. Above them and also facing the door stands Mereruka with his wife standing at his feet.

The scenes represented on this wall are of a most curious combination.
On the right is seated Mereruka with his wife squatting in front of him, breathing the perfume of a lotus flower. Mereruka reaches out with his right hand as if to accept the items from the porters. The columns of text above him are very incomplete, but, directly in front of him is an unbordered list of these goods. They are listed in "thousands" of : breads, beer, meat, cloths, etc.
The column of text in front of Mereruka says: "Observing the sweet offerings, which are brought to him as a boon which the king gives, for the honoured one by Osiris, Meri".
Below the couple is a continuation of the lowest register of those in front of them ().

In the lowest register is shown the manufacture of wine. From the left, four men arrive carrying small baskets full of grapes. The bunches are placed in a vat, and six men holding onto a beam tread the fruit (). In a circular construct, two stone masons prepare a vat (). They form it with chisels, to give it a round shape. Finally the fruit is placed in a bag and stretched between two long poles. When the bag is twisted by the two operatives, the mash is pressed and juice flows out through the cloth (). Another porter at the right-hand side of the register also appears to be carrying more baskets of grapes to be processed.

In the second register, ten granaries have been constructed next to each other; each have arched roofs. Men measure the product of the harvest from fruit trees. These are sycamore figs, red fruits, normal figs and carobs. A scribe takes note of the results. Other people carry away the fruit.
The third register shows two sledges each carrying three tall cases, each drawn by three men, and accompanied in front by a scribe carrying his palette.
The remaining upper part of the wall represents offerings of all kinds, among which are cuts of meat.

On the left, but above the bottom register and occupying the height of the remaining registers, Mereruka (facing south) receives the servants displayed at the beginning of each facing register. They each bring him a vase containing perfumes or oils and stand in front of other offerings.

In the lowest register (this being the one which extends under Mereruka) are represented some butchered animals, with their fore-limbs separated and placed on top of the bound carcasses.
(See )
- in the 2nd register are at eight vases in two crates. The text in front of the servant says: "The best Libyan oil for Mereruka, for his ka, daily".
- in the 3rd are five individuals holding two strips of cloth. The servant's text says: "The best cedar oil for Mereruka, for his ka, daily".
(See )
- in the 4th there are two chests full of incense and colour pigment. The servant's text says: "twAwt-oil for Mereruka, for his ka, daily". Whilst above the first box: "A box containing incense" and the second box: "A box containing kohl" (powdered antimony, for darkening the eyelids).
- in the 5th a further five servants bring more offering vases. The servant's text says: "nXnm-oil for Mereruka, for his ka, daily".

Mereruka is seated on the left facing west, his wife is again squatting in front of him.
As with the east wall, the lowest register passes beneath the seated Mereruka and again it displays butchered animals. At the right-hand end of the register are two servants who present these offerings.
- in the 2nd, ten servants carrying products of all kinds.
- in the 3rd, a servant presents an offering, followed by a chest then vases in crates.
- in the 4th, ten more servants carrying offerings.
- and finally, at the top, two registers of a variety of heaped offerings.
See of the right end of the wall, and south entrance wall view.